I don't have another carb to try, unfortunately (unless I snatch the one off my father's 64 Fairlane, but I like being alive
) so tore mine apart last night. It's got 63 jets in front, wiht 80's in the back, put in a new power valve (6.5), and everthing in it was still Really clean.
Not sure if I posted it, but I did put a different distributor in it night before last with no luck on that either. Also tried a different ignition box (motorcraft).
My father told me that I may have the wrong size pushrods in it. The cam Grind # 270-2h 204/214@50, 270/280, 448/472 from Crane. It's got stock size pushrods in it now. I called Crane and found out how to measure and get the correct size, just to rule that out too.