if you have a local speed shop in your hometown, ask them if they can re spool your alternator. i got mine done for about $50. it went from a 60 amp to about 95amps.
A Chevy s10 short box reg. cab 113" wheel base I have a 1938 Chevy shop manual and it says that the 1/2 ton has a 112" wheelbase and the 1991 s10 short box reg. cab that I'm using for my 1938 Chevy...
There are a couple models, if you have a 4 x 4 it will start with a K, if not it will start with a C. A half ton truck is a 1500, a 3/4 ton is 2500, and a one ton is a 3500.