OK,
It appears that grinding the mounting tabs (cheap way) could be a bit bush league with the creation of unequal pressure. So the best answer is to get them to a machine shop and have them ground on the face to the thickness on the Offenhausers.
I mentioned that the clearance of the throttle bellcrank was already in question. By reducing the thickness of the flanges on the Fentons, that distance moves even closer to the bellcrank. If having the machine shop put a slight angle down when planing to clear the rear underside of the Offenhauser, that clearance becomes even worse.
And then there is also having the 2 15/16 mounting holes filled then re-taped to 2 11/16 to accomadate the Carter W-1's that are going on top. And oh, those zinc plugs? I remember something about that. What's the deal again with those?
Man, do you guys thinks I should get the new recast Fentons and put these Offys on ebay for $20 bucks?
