Bill, an AMT '70 Challenger R/T kit provided the chassis pan and interior tub. I don't think it's a recent kit but I'm not sure. It's kit #6466. The chassis width is perfect, the wheelbase good enough. I had to perform surgery to get some slicks in back and, up front, I had to do some mods so the headers would fit. Otherwise, it really is a hodgepodge of parts. While researching this project, I learned that most of the Mopar pro-stocks in '70 and '71 used the rear ends and leaf springs from their '68 Hemi Darts and Cudas so I did the same using parts from the Revell '68 Hemi Dart. The slicks are from a Polar Lights F/C and the wheels from a Revell '41 Willys gasser kit. The firewall and radiator crossmember are scratch built. I should mention that a forum member (sstacy47) made the intake manifold. His photos on photobucket are of poor quality but the parts he sent me are very nice.