The engine is a 350 four-barrel, which was standard fare across most of the Chevy lines. It made 175 net horsepower and 290 lb-ft of torque. For 1972, the 350 got Stellite valves and exhaust valve rotators. While a 454 was available in the 4x2 lines, you couldn’t get one in the 4x4 in this era. Sometime in the past this engine got an Edelbrock Performer intake and carb, along with chrome valve covers. Whoever painted the air cleaner orange should be beaten.