Just bought a 1987 K10 Silverado standard cab long bed. Has a 350 and 700r4 crate motor/trans with around 60-70k on them. 350 I believe to be 87-95 (the vertical intake bolts says so to me). 700r4 slips a bit in reverse but I'll do the clutch packs in the eventful future.
The saddle tanks were...