I use a Dwayne Porter flat tappet solid cam in my 440/493 eng in my 63 Sport Fury street car. Its been together over 9 years now and has never been back apart and still runs 10.80's on average days through the full exh and 10.70's on good air days. Its 264 & 270 @ .050 with .585 & .592 lift on a 110 LSA. I have it in the eng on a 106 ICL as he said to put it. Its been nothing but great service for me and still working good. He also nitrided the cam and I use the Comp EDM lifters. Ron