Originally, Bret planned to just “build something light, throw something together, and go fast,” so he started with a Factory Five 1933 chassis and body and some leftovers from the RideTech shop. Of course, Bret’s leftovers tend to be a little more exotic than most—unless you happen to have aluminum blocks, NASCAR transmissions, and six-piston brakes just lying around in your storage shed.
http://www.hotrod.com/featuredvehicles/hrdp_1307_no_bull_ride_tech_1933_factory_five_hot_rod/