Joe kept the bare-bones interior of the M37, but as with the rest of the truck he added a few modern conveniences to make life more comfortable. There is no A/C or carpets, but there is a Kenwood stereo and a six-disc CD changer. The steering column and wheel came from a Chevy pickup. Joe added a host of Auto Meter white-faced gauges to keep track of the engine's vital signs. But when there was too much glare to read the gauges, he built pods out of exhaust tubing and angled all the gauges toward the driver.