PUCampin wrote:
I had a co-worker who wanted to regear early 2000's GMC 2500 with a TBI 350. Had stock 3.55, and he put 33" tires on it. He had a small toy hauler trailer. He was thinking 4.10, I told him with the 33" tires and hills where we live he should go 4.56 to keep the 350 in it's power curve. He went 4.1, told me after his first tow he wish he had listened and gone 4.56.
If you decide to sell and get something more recent, get a 6spd. The 6spd pretty much makes the axle ratio a non-factor.
I'd bet this was a late 80 to mid 90 motor if it is a tbi. The vortec went from about 95-2000 or so, then that motor ie 5.7/350 was discontinued about then in favor of the 5.3.
Marty