Probably a turbo 350 trans. This is a three speed trans. The way for you to check is to look at the trans pan. look up a picture of a turbo 350 trans and compare it to your trans pan.
58
305 V8
350 Turbo Hydro is the most common.
17 ft./lbs.
More then likely it is a 305
The 200-4R 4-speed overdrive automatic
Either a 262 cid V6 or a 305 cid V8.
Either a 229 cid V6, a 305 cid gas V8 or 350 cid diesel V8.
Th700-r4
Either a 250 cid I6 or a 305, 350 or 454 V8.
and would i have to buy el camino parts for Chevy 1500 tranny or would i buy Chevy 1500 parts for the tranny?
it is a 700r4