The body and chassis were taken to Precision Street Rods & Machines in Northridge, California, where it was disassembled and many chassis improvements were made. The engine, in parts, was delivered to Hemi expert Dick Landy in Northridge. The Hemi in stock trim has plenty of horsepower, but Lawson felt a Willys needs a blown engine, so he contacted BDS and ordered an 8-71 supercharger. He also contacted Hilborn Injection and got a four-port fuel injector and a scoop. Craig Railsback at BDS told Lawson that he could convert the fuel injection system into a computer-controlled unit that would deliver excellent power and driveability. While the engine was being built, the crew at Precision Street Rods worked on the chassis. They felt the original brakes would be enough to stop a normal street rod without a problem, but with the big, blown Hemi engine, & Lawson's need for speed, a set of Baer brakes would be a better selection.

Lawson intended to take the car on the track occasionally, so a few chassis tweaks had to be done.
They started by modifying the front suspension, leaning it back slightly to make sure the car would go straight under power. The shop also fabricated the front & rear transmission cross member & mount. When Lawson ordered the chassis, he also ordered a Halibrand quick-change rear end. Precision Street Rods disassembled the unit, had the center section polished, & chrome plated the control arms. Halibrand wheels with Mickey Thompson tires finish off the chassis.