I've heard the Olds 455 mentioned on this thread more than once. My brother ran one in a dirt track car for a few years. I remember him talking about building it to W30 specs which meant torque, torque and more torque. Funny thing was how it could handle the RPM too which I didn't expect out of a big block. It really shined on the bigger 3/8 and 1/2 mile tracks.