V8 swap questions. - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 10-28-2013, 04:21 PM   #1
Jeeper
 
1987Wrangler YJ's Avatar
 
Join Date: Jun 2013
Posts: 568
V8 swap questions.

Thinking of putting in a 327 in my jeep in a couple months. Some questions that I have are: Will the weight of this engine sag down my front suspension?(3inch SL) Will my rebuilt tf999 hold up to the engine?(not beating on it just daily use) Can I run side pipes between the frame and body( I have a 3inch BL) I want to run it carbed and as simple as possible. so will I need a wiring harness? I am putting this engine in because my 4.2 has absolutely no power on the highway. Thank You guys and any tips are appreciated

1987Wrangler YJ is offline   Quote Quick Reply
Old 10-28-2013, 04:58 PM   #2
Sponsoring Vendor
 
Ibuildembig's Avatar
 
Join Date: Aug 2010
Location: Fruitland, Missouri
Posts: 8,483
No problems with springs but you might have a problem with a tranny adapter, but I dunno much about gm stuff.

Ibuildembig is offline   Quote Quick Reply
Old 10-28-2013, 05:02 PM   #3
Jeeper
 
1987Wrangler YJ's Avatar
 
Join Date: Jun 2013
Posts: 568
I found an adapter off of advanced. What about an amc 304/360 I also have the opportunity to get those.
1987Wrangler YJ is offline   Quote Quick Reply
Old 10-28-2013, 05:03 PM   #4
Jeeper
 
overthehillsahara's Avatar
 
Join Date: May 2011
Location: Secaucus, NJ
Posts: 79
Images: 4
When I started my swap I looked into that also. There is a minimal increase in the weight only about fifty pounds if I remember. I went with an aluminum intake which made it even less of a difference.
__________________
88 YJ Project-Lots of parts, no time.

06 F250 FX4-DD
overthehillsahara is offline   Quote Quick Reply
Old 10-28-2013, 05:05 PM   #5
Sponsoring Vendor
 
Ibuildembig's Avatar
 
Join Date: Aug 2010
Location: Fruitland, Missouri
Posts: 8,483
A better choice IMO, but they are more expensive to put together.
Ibuildembig is offline   Quote Quick Reply
Old 10-28-2013, 05:11 PM   #6
Moderator

::WF Moderator::
 
harleydragon's Avatar
 
Join Date: Jul 2012
Location: south georgia
Posts: 3,908
you won't need a wiring harness..carbed chevy is simple
harleydragon is online now   Quote Quick Reply
Old 10-28-2013, 05:13 PM   #7
Sponsoring Vendor
 
Ibuildembig's Avatar
 
Join Date: Aug 2010
Location: Fruitland, Missouri
Posts: 8,483
Quote:
Originally Posted by harleydragon View Post
you won't need a wiring harness..carbed anything is simple
Fixed it for ya
Ibuildembig is offline   Quote Quick Reply
Old 10-28-2013, 05:26 PM   #8
Jeeper
 
1987Wrangler YJ's Avatar
 
Join Date: Jun 2013
Posts: 568
the 360 I have is FI. Could I swap intakes and run a carb? 327s are so much more expensive also. is the 304 Even worth swapping in?
1987Wrangler YJ is offline   Quote Quick Reply
Old 10-28-2013, 05:32 PM   #9
Sponsoring Vendor
 
Ibuildembig's Avatar
 
Join Date: Aug 2010
Location: Fruitland, Missouri
Posts: 8,483
Oh I was thinking amc when you said 360. I would do the 304 over the 360 if it were me but I like the amc v8's.
Ibuildembig is offline   Quote Quick Reply
Old 10-28-2013, 06:18 PM   #10
Jeeper
 
1987Wrangler YJ's Avatar
 
Join Date: Jun 2013
Posts: 568
I've read on another forum that the 304 will bolt directly to an earlier carbed YJ. Is this true?
1987Wrangler YJ is offline   Quote Quick Reply
Old 10-28-2013, 07:12 PM   #11
2xs
Cali Smog Nazi.

WF Supporting Member
 
2xs's Avatar
 
Join Date: Jun 2011
Location: Santa Rosa, Ca.
Posts: 2,680
Images: 3
Where are you located?
__________________
'93 Black YJ, 4.0L AX15 - UNDER CONSTRUCTION!
http://www.wranglerforum.com/f330/2x...ad-490865.html
'04 SV1000s:
http://www.svrider.com/forum/showthread.php?t=280873
Old Jeep that was totaled (and SOLD!):
http://www.wranglerforum.com/f330/2x...ad-101879.html
2xs is offline   Quote Quick Reply
Old 10-28-2013, 07:20 PM   #12
Sponsoring Vendor
 
Ibuildembig's Avatar
 
Join Date: Aug 2010
Location: Fruitland, Missouri
Posts: 8,483
Good question 2xs. Hopefully not in a state that won't allow it. Worst problem we have here is a lift law lol
Ibuildembig is offline   Quote Quick Reply
Old 10-28-2013, 07:56 PM   #13
Jeeper
 
1987Wrangler YJ's Avatar
 
Join Date: Jun 2013
Posts: 568
Pennsylvania. Im not worried about swapping a earlier year engine into the jeep, or passing emisions. My friend is willing to sell me a worked 327 that put about 320 hp. or another who is selling a bone stock 304 for the same price. Im guessing the 327 I better? this will just be a daily driver/ trail rider.
716131-A : Chevy V8 to Jeep torqueflite adapter | Advance Adapters am I in the right ball park with this adapter for the Chevy engine?
1987Wrangler YJ is offline   Quote Quick Reply
Old 10-28-2013, 08:05 PM   #14
Moderator

::WF Moderator::
 
harleydragon's Avatar
 
Join Date: Jul 2012
Location: south georgia
Posts: 3,908
I love chevys but the 304 would probably be a lot cheaper to do
harleydragon is online now   Quote Quick Reply
Old 10-28-2013, 08:52 PM   #15
Jeeper
 
1987Wrangler YJ's Avatar
 
Join Date: Jun 2013
Posts: 568
Why because of the adapters?
1987Wrangler YJ is offline   Quote Quick Reply
Old 10-29-2013, 08:20 AM   #16
Moderator

::WF Moderator::
 
harleydragon's Avatar
 
Join Date: Jul 2012
Location: south georgia
Posts: 3,908
Quote:
Originally Posted by 1987Wrangler YJ View Post
Why because of the adapters?
yeah..other than that ( in my opinion) the older small block chevys are the cheapest engine to build or maintain
harleydragon is online now   Quote Quick Reply
Old 10-29-2013, 08:53 AM   #17
Jeeper
 
JeepYJBoy's Avatar
 
Join Date: Feb 2012
Location: Maine
Posts: 185
I rebuilt a amc 304 and it wasn't any more expensive then the chevy 350 I built I ended up puting in the 304 it was the easiest swap I've done everything just bolted up and wiring it up was just plugin for the most part. It's was bored 30 over put and edelbrok high rise intake and an Holley 4 barrel it screams it also has a ton of power and torque. I love it so far!
JeepYJBoy is offline   Quote Quick Reply
Old 10-29-2013, 04:11 PM   #18
Jeeper
 
1987Wrangler YJ's Avatar
 
Join Date: Jun 2013
Posts: 568
Was thinking of just getting the heads redone and throwing a cam with a nice exhaust. Will the steering shaft clear the engine/header?
1987Wrangler YJ is offline   Quote Quick Reply
Old 10-29-2013, 04:15 PM   #19
Sponsoring Vendor
 
Ibuildembig's Avatar
 
Join Date: Aug 2010
Location: Fruitland, Missouri
Posts: 8,483
Depends on the headers. I had to make a shaft for mine.
Ibuildembig is offline   Quote Quick Reply
Old 10-29-2013, 04:17 PM   #20
Jeeper
 
1987Wrangler YJ's Avatar
 
Join Date: Jun 2013
Posts: 568
Lol yeah I just got done watching your build with the Golden eagle...Man that thing is beautiful!!!
1987Wrangler YJ is offline   Quote Quick Reply
Old 10-29-2013, 04:19 PM   #21
Sponsoring Vendor
 
Ibuildembig's Avatar
 
Join Date: Aug 2010
Location: Fruitland, Missouri
Posts: 8,483
Thanks man, it's almost done lol
Ibuildembig is offline   Quote Quick Reply
Old 10-29-2013, 05:41 PM   #22
2xs
Cali Smog Nazi.

WF Supporting Member
 
2xs's Avatar
 
Join Date: Jun 2011
Location: Santa Rosa, Ca.
Posts: 2,680
Images: 3
Thinking about this, I would opt for the 327, the emgine mounts are the same for all smallblocks.
Mailny, this allows you to easily adapt any GM smallblock into your Jeep, incase emissions laws change in your area, or you blow up this one, and opt for a 5.7L
The GM engine has WAY more aftermarket support, in more configurations (Up to '99 in pickups with the poppet injector Vortec motors), and I believe the LS series uses the same mounting configuration.

The AMC is not made anymore, and has not been since(I think) the mid 80s.

As far as adapting it to your transmission, you can probably sell your TF on CL for enough to pick up a T350 or older 700R4 (I can get either freshly rebuilt, shift kit and all the updates for $750 (My Core)).

Just my .02
__________________
'93 Black YJ, 4.0L AX15 - UNDER CONSTRUCTION!
http://www.wranglerforum.com/f330/2x...ad-490865.html
'04 SV1000s:
http://www.svrider.com/forum/showthread.php?t=280873
Old Jeep that was totaled (and SOLD!):
http://www.wranglerforum.com/f330/2x...ad-101879.html
2xs is offline   Quote Quick Reply
Old 10-29-2013, 06:40 PM   #23
Moderator

::WF Moderator::
 
harleydragon's Avatar
 
Join Date: Jul 2012
Location: south georgia
Posts: 3,908
Quote:
Originally Posted by 1987Wrangler YJ View Post
Was thinking of just getting the heads redone and throwing a cam with a nice exhaust. Will the steering shaft clear the engine/header?
earlier this year I replaced the headers on both my cj7's with 350's to cast iron ramhorn manifolds similar to those used on 60's corvettes.It solved all my clearance issues,reduced the under hood temp tremendously and I have not had any exhaust leaks to repair since putting them on.Many of the early chevys had ramhorns but the ones on the corvettes had a 2 1/2 inch outlet,as do mine..
harleydragon is online now   Quote Quick Reply
Old 10-29-2013, 09:34 PM   #24
Sponsoring Vendor
 
Ibuildembig's Avatar
 
Join Date: Aug 2010
Location: Fruitland, Missouri
Posts: 8,483
I agree most cheaper headers leak but it look like crap running side pipes off manifolds. There's a few places that make good fender well headers now so that shouldn't be an issue
Ibuildembig is offline   Quote Quick Reply
Old 10-30-2013, 05:42 PM   #25
Jeeper
 
1987Wrangler YJ's Avatar
 
Join Date: Jun 2013
Posts: 568
Well, talked to that guy with the 327 he is willing to sell it for 200 bucks running. Was that link with the adapter correct or no? appreciate all of the help!
1987Wrangler YJ is offline   Quote Quick Reply
Old 11-01-2013, 10:40 AM   #26
Jeeper
 
1987Wrangler YJ's Avatar
 
Join Date: Jun 2013
Posts: 568
an update. Bought the 327 last night and I am going to pick it up tomorrow.
1987Wrangler YJ is offline   Quote Quick Reply
Old 11-01-2013, 11:11 AM   #27
2xs
Cali Smog Nazi.

WF Supporting Member
 
2xs's Avatar
 
Join Date: Jun 2011
Location: Santa Rosa, Ca.
Posts: 2,680
Images: 3
__________________
'93 Black YJ, 4.0L AX15 - UNDER CONSTRUCTION!
http://www.wranglerforum.com/f330/2x...ad-490865.html
'04 SV1000s:
http://www.svrider.com/forum/showthread.php?t=280873
Old Jeep that was totaled (and SOLD!):
http://www.wranglerforum.com/f330/2x...ad-101879.html
2xs is offline   Quote Quick Reply
Old 11-01-2013, 11:37 AM   #28
Jeeper
 
Join Date: Jan 2013
Location: Adair Co. KY
Posts: 429
The M.O.R.E. mounts are self locating (it tells you where they need to be put) check out my build to see if you like the location it puts it, they are what I used. I also did as Harleydragon did on exhaust, ramhorns, plenty of room with those. And to me they look great.
__________________
My 305 swap http://www.wranglerforum.com/f8/89-y...ad-256560.html
Debating a Chevy v8 swap? read this thread
http://www.wranglerforum.com/f330/ch...l#post10826122
kywaterman is offline   Quote Quick Reply
Old 11-01-2013, 03:23 PM   #29
Jeeper
 
1987Wrangler YJ's Avatar
 
Join Date: Jun 2013
Posts: 568
This engine is out of a 68 impala??? I forget the specific year. When putting this engine, will it just bolt to the trans with the adapter, or will I have to pull the whole tranny and t-case forward to clear the fire wall? and also I have a brand new double core radiator but it is supposed to be used on the 4.2 would it be enough for the 5.3? And kywaterman, nice swap, what headers are those?
1987Wrangler YJ is offline   Quote Quick Reply
Old 11-01-2013, 04:01 PM   #30
Moderator

::WF Moderator::
 
harleydragon's Avatar
 
Join Date: Jul 2012
Location: south georgia
Posts: 3,908
not sure if you will have to move it or not but the distributor is what you have to leave clearance for..use the ramhorn manifolds for a small block chevy..the corvette type that I use have a 2 1/2 inch outlet but others are smaller,2 or 2 1/4..you can find new ones on ebay for less than 150..you will then need donuts and flanges which are cheap

harleydragon is online now   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




Download our Mobile App

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 08:27 AM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC