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66 Small Block Exhaust Manifold/Header Fitment

4.5K views 20 replies 11 participants last post by  mrhchevy62  
I'm using the 2.5 in rams horns. Drivers side 1/4" clearance. I had to remove the entire rear corner of the passenger shock tower to get clearance. Removed the upper a frame and welded in a cover for the hole from the outside. I was afraid the large hole in the inner fender would weaken the upper a frame support. Now has 1/4" clearance.