go to amazon.com and buy you a chevy casting number book. it has sbc, bbc, heads, cranks, starter, alt., even egr valves and carbs all in one book. mine cost 15 bucks. search chevy casting numbers, should be a black book.
Chevys are pretty easy. Axles are either Dana 44, corporate 10 bolt or Dana60 in front, Plus the IFS 8.2 and 9.2. Rears are 10 bolt, 12bolt, 14 Bolt FF or SF or Dana 70 for duallys. Transmissions can be identified by the pan for automatics 350, 400, 700 4l60 or 80 E, manuals are either, Saginaw 3spd, 420 and 465 4 spds and NV3500 and NV4500 5 spd and ZF S6650 6 spd. T-cases in full sizes from 70 on up Dana 20, NP 203, 205, 208 and 241's plus the newer electric models and 261's for heavier stuff. That pretty much covers the majority of running gear parts.
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