Quote: Not sure how much it will pick up in the car with a full exhaust system.
That's pretty much what Dwayne Porter and I were debating when I called him on Saturday to ask "What if...?" re: Chapman heads.
Unfortunately, it's really one of those "Try it and find out" situations. It might not be as big an improvement as the increased CFMs would lead you to expect. Or... it could freakin' scream.
According to Mike Lane @ Chapman: - Chapman can sell them bare, w/ valves, or assembled as desired - 1.950" installed spring height w/ "nothing special" hardware & their valves - Use T&D rockers w/ .750" intake offset (I wasn't expecting that much was required) - Use standard big-block head bolts (for 260s only?)
