The 421ci High Output V8 features three Rochester two-barrel carburetors and was factory rated at 370 horsepower.The engine was rebuilt using AutoTec forged pistons, RPM H-beam connecting rods, a COMP Cams hydraulic flat-tappet camshaft, screw-in rocker arm studs, and a Butler Performance oil pump.The five-digit odometer shows 59k miles, approximately 300 of which have been added since the refurbishment was completed in 2018.True mileage is unknown.