I took the cast log manifolds off my 455 GTO which has the 068 cam. It really woke the car up. The seat of the pants feel is I gained ALOT of power.
First time after they were installed I went to get gas they scraped on the pavement in the gas station on a dip in the concrete. I have stock ride height.
Keeping my fingers crossed they don't eventually get crushed like they were on my '72 TA long ago.
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