and this will bolt in place of a standard 73-up A-body 11'' rotor?, using the same bearings and everything? (and of course using the 11 3/4 caliper brackets)
Yup. The Summit part # is actually the same as the Centric part #, they're just drilled and slotted 11 3/4" rotors. That's not my picture, I borrowed it from a member on Cuda-Challenger since I was unlucky enough to have installed my plain 11 3/4" rotors already when Summit came out with the drilled/slotted ones. :violent1:
But, they're a direct swap onto any '73 up A or FMJ spindle. Same bearings, just need the caliper brackets.
That Mopar Action article is COMPLETELY WRONG about the FMJ spindles. They do alter geometry slightly, but most folks will never even notice the difference. And if you are driving hard enough to notice the difference, then you'll notice the improved camber gain a lot more than any of the toe gain. It is useful as far as a parts list goes, if you ignore the comments about the FMJ spindles.
But you don't have to believe me. Mopar Muscle actually studied the geometry changes and published everything in this article. Bottom line is, you can use FMJ spindles without issue.