My Valiant weighed 3530 lbs. The base engine was from my older racier car, indy RB blocked 528, Eagle crank, C&A steel rods, 31cc dished Ross pistons, 440-1 heads with 2.25" intake valves home ported, Straightline performance mech roller cam with about 260 degrees at .050" and 0.65" lift, indy single plane with a Chuck Nuytten pro street dominator, MSD 6 AL, 2" x 34" primary headers and 3" dual exhaust with x-pipe and four mufflers. CR was 11.3:1. Later we drove one season with the same engine in our C-body Plymouth VIP and run 10.6's with it with a PG, 4.10 gears and 32" tires. Because of only two gears it pretty much was equal to the 3.23 gers in the Valiant. The block, intake & heads are still in use in the current turbocharged engine that has pushed the C-body to 8.0's.