So….more header talk….this had me scratching my head

That makes sense. Which is what Calvin always says. When the header works you need to rethink everything else.

Do you mind sharing the cam specs?? If not, I understand.

Sure, it was a 282in and 290ex @ .050 with around .800 lift with 1.7 rockers. Changed to a 282in 284ex @.050 with the same lift. Picked up 25lb ft of TQ under the curve and 2 additional HP. LOL. The tq curve flatten out, makes a nice bracket engine. The BSFC number dropped to 1.02, so I think it needed even less exhaust duration, but i don't have the stones to order a cam with less exhaust duration than intake. I know Calvin said that's not uncommon, i just can't do it. :) FYI, I am limiting the power/rpm of the engine because it's a stock B block.

Joe