disc brake bracket identification

I made these brackets from a fellow vanner's '65 and am not sure what style they are . From reading previous posts I think they are the 4th edition that take the Nova rotors/ calipers or will the Trans Am rotor/ blazer caliper set up work? If not, what calipers/rotor set-up will work with these Brackets?Thanks for any help.

I'm not the expert but if they are flat brackets I believe they would be for the Nova setup. M1's are off-set at the caliper ends to allow clearance for Rotors and other things .

Yes, they are flat brackets.

the flat brackets take the nova rotors, M1dadio`s are not flat,
I think the year nova is 68/73 with front disc brakes, not sure
what the first year disc brakes were available on novas, but should
all b the same 68/73

That is a copy of the M1D10KN bracket I designed, yes I did design a flat bracket for the nova rotor.








M1D