Norm says:
I build each one from scratch, with a lot of aftermarket parts, the chassis, axles, and some shocks are scratch built. The wheels, tires and some of the engine are aftermarket parts or box parts the wings are all scratch built. Painting is sometimes done by hand or spray. The headers are made from solder and the side rails and bumpers are made from aluminum welding rod. The decals are made by Gene Shortt out of NY.
Also, be sure to check out
Norm Sterner's on-line image gallery, it's awesome!
Norm sent these images of Johnny Paynes #67 ISMA supermodified in early April, 2007. He had just spent 2 1/2 months building it entrely from scratch.