They can run hot though I never had any problems with the one I had. It came out of a 72 Caprice Classic station wagon with around 100,000 miles on the clock. I dropped it in a 62 1/2 ton and backed it with a 3 speed, all I could afford. When the cam went south I replaced it with an Isky 30-30 from 1964, an Offy 360º intake, a Holley 650 dp and a set of Hedman headers. I had a 3100 # pressure plate built for it and the best clutch disc I could afford. The only problem I had was keeping rear ends together.