1973 340, want more power.

1968FormulaS340 said
Exhaust manifolds, more than likely, are not hurting your off-line performance. I would look elsewhere for the problem.

I'm not a fan of tall rear tires.

I was referring to what was posted in post 44. The MPH in that post is slow.

I have no idea why you would think piss poor exhaust won't kill 60 foot times.