that is some good info. I milled my early 2&1/4 outlet ex manifolds 1/4" & it barely clears on the pass side & alot of room on the drivers side tho this is the 63 dart stock car with the racing thin steering shaft & this is with 3/8" of spacers on each motor mount but now that I have milled them I am going to see if I can remove em. On a side note I thought the 68-70 340 pass side ex manifold was way wider (maybe I'm wrong on that) than the pass magnum but a moot point cuz I am good right now. I do have a 408 stroker in the works & I'd like to use another set of magnum manifolds when the time comes in an early A body