Joe has been through four different drivetrain's since he purchased his M37 with a 351C and SM420 transmission. The current engine is a TBI 454ci Chevy V-8 that Joe swapped in with the help of his friend Marty Boyer. The big-block is backed by a 4L80E four-speed automatic mated to NP203 and NP205 doubled transfer cases. On the driver side of the firewall is the Hydroboost, which is set up for the four-wheel disc brakes. The valves on the passenger side use the heat of the big-block to power an underhood hot water shower.