Propelling the buggy is a propane-fired GM 377ci V-8.The Machine Shop did all the machine work and then it was fitted with forged Icon pistons; an Aaron’s oil pan; early angle-plug GM heads; a solid camshaft; Howard’s valves, valvesprings, and roller rockers; an Edelbrock Air-Gap Performer intake; dual 425 IMPCO carburetor mixers; Spectre air cleaners; Pertronix distributor; custom headers; and a Dynomax muffler. Harrell estimates the ‘plant produces 450 horsepower and 400 lb-ft of torque. Amperage is generated by a Dusty’s Suzuki Samurai-application 83-amp alternator and a pair of Optima RedTop batteries. Keeping the V-8 cool is the job of a Speedway radiator with a single 16-inch-diameter pusher fan. Bolted to the engine is a Key Transmission-built TH400 transmission with manual valvebody and cooler. An Advance Adapters 3.8:1 two-speed transfer case sprouts a pair of West Texas Off Road-built driveshafts.