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lost 03-26-2008 10:32 PM

Chevy guys n girls?
 
I'm going to go take a look at a '79 K5 Blazer this week.
It has a 350 5.7L, a th350 transmission and a np203 t-case.
Hows the th350 and np203 strength wise? The axles will be overkill so I'm worried about the trans and mainly the t-case as being the weak link and the first thing to break.

Thanks,
-Matt

Smeghead 03-26-2008 10:54 PM

Everything will break they suck

distortedtj 03-26-2008 11:24 PM

are they the factory motor and tranny or aftermarket.

lost 03-26-2008 11:37 PM

Quote:

Originally Posted by distortedtj (Post 211854)
are they the factory motor and tranny or aftermarket.

the motor is a gm goodwrench crate motor, I think the transmission is stock

distortedtj 03-26-2008 11:44 PM

the motor should be fine..the tranny...well that depend on what your gonna use the truck for.

So what are you gonna use the truck for???

lost 03-26-2008 11:47 PM

as a mud buggy. I bought a set of 2.5's that I'm picking up this weekend and I'm planning on running 47-52" r1 tractor tires :)

distortedtj 03-26-2008 11:59 PM

you mite want to either build the t350 up or up grade to a built 400.

i ran a gm 350 crate motor in a 79 chevy with a built T350 trans that i built up with new clutches and a 2400 stall and full rebuild and it worked great. I ran it through a few mud holes:D without any problems.

http://i182.photobucket.com/albums/x...s/MVC-016F.jpg

http://i182.photobucket.com/albums/x...s/MVC-007F.jpg


If i did it again i would of probally went with the 400.

:wavey:

Gary1129 03-26-2008 11:59 PM

Quote:

Originally Posted by lost (Post 211864)
as a mud buggy. I bought a set of 2.5's that I'm picking up this weekend and I'm planning on running 47-52" r1 tractor tires :)

Not for long you wont......Buddy has 38s on about the same truck and he has pretty much broken everything....axles transfer case u joints rear carrier pick something......If holds together for one run Id be amazed.....

JCS05Rubi 03-27-2008 06:22 AM

350s never die. a factory turbo350 trans wont break under stock old school V8 power (which isn't much), but isnt going to last with a crate motor. A good BUILT turbo350 won't break, but a 400 would give you overdriver :)

Transfer case and front axles are usually the week link. The front axle should be a 10 bolt, which is not going to hold up to that kind of abuse, and those transfer cases are notorious for not lasting. The rear axle should be a 12 bolt, which is GREAT normally, but i doubt it will last with that abuse either.

id say built the trans, or toss in a built 400, swap the transfer case and the axles, and youd be good to go.

BTW distorted, thats a SWEET truck!!! there was a guy around here that had an 81 K1500 reg cab short bed. 350, built turbo350 trans, 6" suspension lift on 33s that I was going to buy for 700 bucks, but I ended up getting a hard top for the Jeep instead.

[TheYJGuy] 03-27-2008 08:26 AM

Sorry, not a Chevy Guy

:include:

lost 03-27-2008 08:52 AM

Quote:

Originally Posted by distortedtj (Post 211868)
you mite want to either build the t350 up or up grade to a built 400.

i ran a gm 350 crate motor in a 79 chevy with a built T350 trans that i built up with new clutches and a 2400 stall and full rebuild and it worked great. I ran it through a few mud holes:D without any problems.

If i did it again i would of probally went with the 400.

:wavey:

Thanks :wavey:
how much did it cost you to rebuild the th350 and around how much would a 400 cost?

Quote:

Originally Posted by JCS05Rubi (Post 211927)
350s never die. a factory turbo350 trans wont break under stock old school V8 power (which isn't much), but isnt going to last with a crate motor. A good BUILT turbo350 won't break, but a 400 would give you overdriver :)

Transfer case and front axles are usually the week link. The front axle should be a 10 bolt, which is not going to hold up to that kind of abuse, and those transfer cases are notorious for not lasting. The rear axle should be a 12 bolt, which is GREAT normally, but i doubt it will last with that abuse either.

id say built the trans, or toss in a built 400, swap the transfer case and the axles, and youd be good to go.

BTW distorted, thats a SWEET truck!!! there was a guy around here that had an 81 K1500 reg cab short bed. 350, built turbo350 trans, 6" suspension lift on 33s that I was going to buy for 700 bucks, but I ended up getting a hard top for the Jeep instead.

im swapping the axles, I've seen a more than a few 10 bolts break. I guess I'll swap in a np205 for the case and either build the transmission or swap it.
does anyone know any good gm sites besides CK5? (i want to figure out what np205 i need and how much the trans and t case swap will cost before I get this truck)

Thanks again for the help,
-Matt

and x's 2, that truck is badass :punk:

White93ARB 03-27-2008 10:46 AM

Quote:

Originally Posted by Smeghead (Post 211844)
Everything will break they suck

Chevrolet. Like a Rock. :rolleyes: ;)

distortedtj 03-27-2008 12:15 PM

Quote:

Originally Posted by lost (Post 211940)
Thanks
does anyone know any good gm sites besides CK5? (i want to figure out what np205 i need and how much the trans and t case swap will cost before I get this truck)

Thanks again for the help,
-Matt

and x's 2, that truck is badass :punk:

you can try fullsizechevy and pirate is a great forum.:wavey:

JCS05Rubi 03-27-2008 05:58 PM

fullsizechevy is where i frequented with my 2500 etc. Good group of knowlegable guys :)

distortedtj 03-27-2008 06:47 PM

I miss that old 79 i built up, i ended up sale'n it about 6 or 7 years ago.


it was origally a 2wd when i bought it.

lost 01-05-2009 05:37 PM

i know its late but thanks for the help, i ended up passing on the truck.


now same question, different rig :D

Quote:

Originally Posted by seller
its a 1986 k5 with rebuilt 350 with 6000miles,
Trans 700, t-case is NP 208 (I think)
Axles...14 bolt rear, Dana 60 front 4:88 gears
Ball joint front, ALL TIGHT!
40" boggers

He's asking $4500 I think I can get it lower.

How does the 700 and 208's hold up? I will be wheeling this only in the mud but since this will be a mud only rig it will get abused.

lost 01-05-2009 05:39 PM

Quote:

Rebuilt 350,headers, locker in the rear, 39" Boggers. but can fit 44" with no problem, 4 wheel disc brakes...15" 8-lug rims...
Runs tight, and straight, tires are loud, but I can drive it down the highway going 70 with 2 fingers on the wheel...even has a decent stereo, and 12" subwoofer
http://img370.imageshack.us/img370/4236/sidetg6.jpg

http://img352.imageshack.us/img352/4...ontsidelf1.jpg

http://img55.imageshack.us/img55/1290/rearnh7.jpg

http://img385.imageshack.us/img385/3785/frontrr4.jpg
heres the rest of the ad. These axles will eventually find their way into my tj when I get a new DD and my rocks will be going under this.

so what does everyone think? good or bad deal :wavey:


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