no need to upgrade the dirty thirty bra..
but if you gunna be lockin it, then yea, throw some chromolly shafts in it, if you runnin open, it should be fine
as far as the rear, all you gotta know is the 8.8 is hands down the way ta go.
its easy, convenient, and stout.
trash that dana 35 right quick
does this answer yer Q?
btw, im guessin yer new '94 dont gots 4:10's like yer '95 had.
im also guessin since yer '95 was a 4.0, that you did the gear swap yerself..
so, like buckshot said, get that 8.8 from a '95 and up (4:10's and disks), then you can just swap yer 3:07's up front wit the 4:10s ta match the rear..