how can i tell what i have?

[88 Dippy]

hey i am looking at buying a 1974 Chevy K10. but i was woundering how can i tell what trim level the truck was? it was repainted (originaly a gold color now a red metalic) fender badge says it's a cheyenne 10 but is missing all the chrome to be one. the interior is nice looking has wood grain insets on the doors and door pockets. has a brushed aluminum dash but it has manual locks and windows and no A/C.

also the tranny and T-case where replaced with a 700-R4 and a NP208

thanks for all help