As Tim says pretty hard to know what came with the truck but you can look for some options like the following.
Wheels-several options available.
You say the engine is gone options there would have been air cleaner or fuel pump.
Cab-does it have corner windows, chrome grill, stainless window moldings, RH mirror?
What kind of heater (3-types available in 47), RH visor, cigarette lighter or a radio?
There are a few things you can look for.
