Think I will have it welded up and run it. Looks like I'll also need to grind down the tabs for the mounts, its a bit over 1/2" thick, and the exhaust header is 1/4". Kind of hard to have a shared bolt with that discrepancy. The old header had 1/4" plates welded on the flanges to make it work, but I thinking grinding down the manifold would work just as well.