I used a 440 block from a 1976 Winnebago. I tore it down and had my machine shop clean, magnaflux, install new cam bearings, and bore it 30 over. I had a steel crank and LY rods. Got some Wiseco Pistons for about 10:1 comp. Edelbrock RPM Performer, 440 source heads. 509 cam, TTI headers and used...