Summit sells them now!
Summit now has cross drilled and slotted rotors in the 11 3/4 size part# SUM BR 63009R/L. $65 ea. Or search rotors for 1976 Coronet.
I discovered this the week AFTER I bought new plain 11 3/4" rotors for my duster. :banghead:
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)
If you want to use stock 11.75" rotors and `73 and up A-body knuckles, check out Mopar Action's article
http://www.moparaction.com/Tech/archive/disc-main.html
This tells you everything you need to know. Also, AR Engineering makes a kit to mount Wilwood calipers on those knuckles. Hot setup.
http://arengineering.com/products/wi...-11-75-rotors/
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.
http://www.moparmusclemagazine.com/techarticles/suspension/mopp_0503_swapping_a_and_b_disc_brake_spindles/index.html
Oh, mopardude, don't forget you also need 15" rims to run 11 3/4" rotors. 14's won't clear the calipers.