I recently bought a 1986 C10 with the Silverado package. The truck has
What percentage of the driving is the truck gonna be pulling? With the
305, I would suggest 3.73 if not 4.10 if pulling over half of the time. Otherwise maybe 3.08s would be better than the 2.73's but still keep the RPMs low enough for freeway driving. Depending on the rear spring packs, you might want to look into a set of overload springs.I had a 1/2T with only 4leaf packs...rode great but couldn't handle a load for nothing. Was on the bump-stops before 1000lbs was loaded in the bed. With a 400 and 3.08s, it sure didn't have much trouble with a full ton of gravel in the bed!
Is it a 10 or 12bolt rear? Where are you located. I could probably set you up with a 3.08 or 3.73 12bolt if your interested.
I would probably consider a 3.42 a minimum with a 3.73 being an optimum with a 305.
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