Quote: I haven't denied mine but I'm thinking May 300 to the rear wheels. My 273 has a lot of trick thinks like low ring tension, offset balance, head porting and work on the runners. We were able to get 116% port velocity and about 168 in flow. That's with a 920 head, stainless 1.88 valves cut down to 1.84.
Geeze... That's like 350-375 hp at the crank? There is a guy on FABO who built a 273. Has a mild cam, 0.030" overbore with Egge pistons (10.5:1 cr), and a 4-barrel. He says he'd probably make around 275 hp and 300 ft-lbs of torque at the crank.
