Very similar setup to the IMCA spec engines we used to run in a dirt burner, HP should be in the 340-360 range, torque probably around 380.....This is IF the block is square decked, good headers, and a 600 carb..... The heads are the restrictive part of the engine.....IMCA stuck with them for years trying to keep the cost out of the engine, finally went to a new cast iron spec head, horsepower up about 25 and torque up about 40!!!!!!