Quote: Maybe it's just me,but I don't think you will see much of a gain until you put the bigger camshaft in it. On the header subject,1 3/4" headers seem to be the ticket with mine. I ran 1 7/8" before thinking they were necessary. My dyno testing lately shows a hole in the torque curve that just does not get made up for up top with the bigger headers. In anything that launches at or below about 4500 rpm anyway,I am learning to like 1 3/4" headers more and more. Keith
No offense but I disagree that it won't be much gain. I had a 408 that was almost identical to this build, same cam. Went from mild eddies to indybrocks, and gained 4 mph in the 1/4. So I am going to guess 560-570 horsepower.
