The AV8 rpu is a late indented firewall 31 with a shortened late 31 (32 style) wide bed. 39 engine and rebuilt transmission with 26 tooth original LZ gearset. Built with a 32 K member, Halibrand QC rear, 40 lincoln brakes... Walker rad, power gen alternator, mild cam, 3 5/16 pistons, Mallory ignition... It has a good transferable 1931 Texas title.