I have used this combo many times for F bodies . It works well. I dgreed the cam forward 4deg for chain break in. After checking chain stretch when customers have requested it, I found the cams were always within a half of a degree of where manufacturer recommended. Mind you these were built for decent running setups with out spending big bucks. Everyone was pleased and started getting a bit more greedy for other options in the drivetrain etc (figures...lol) I have used same combo with varying cams but always kept it moderate,272 crane, 260 and 268 comp,even dug out some old school isky and ersons. I like what he's doing here with this thing.