Totally different story with the 340 we tested them on. We had 476HP with the 1 5/8 Summit headers. Went to 1 5/8- 1 3/4 TTI and picked up 40HP and 300rpm. Guess its all in the combo. But we peaked at 7200rpm
Mike have you ever dyno tested Hedman Huslers against the TTIs? Not the cheap Headmans, the $700 race headers. Hedman did make a set for the early a bodies. They have one tube on each side that go through the inner fender, but are much easier to install than TTIs.
