Let's Build a 416 with Cast Iron Heads and Manifolds

If you’re dead set on using exhaust manifolds, Herbert’s has the option to modify the LSA of their shelf grinds. I’m partial to this grind for that setup with the 3.55 gears and four speed, but with a little wider LSA to reduce the overlap.
CE6K 245/255 [email protected], 585/600, 106LC, 2500-6800