What about a 254 Flathead Six? I have a nice 51 254 which was rated 112HP, and 217LB-FT of Torque. The 254 is basically a 226 with a larger bore from the factory, stroke is the same as the 226. Most parts interchange between the two engines. I have also read about people putting a 226 head on the 254 to raise the compression since the combustion chambers are smaller on the 226 head. It should raise compression from 6.8 to approximately 7.5/1 . Bob(rswhitmore@yahoo.com)