What engine do I have?

1992 Ford F250 4WD V8 Gasoline. Is there any way of finding out which engine is in the truck?

what is the 8th digit in your vin number? that is for the engine the factory put in your truck.

N = 5.0L
H or R = 5.8L
G = 7.5L

or, look for the emission sticker in the engine compartment. It will say what year emissions, whether federal or california and say what engine it came with.