Need help determining which hardware kit I should order..

What's the bolt circle on your axles? Small bolt pattern (5 on 4") only came with 10 X 1 3/4" brakes. Big bolt pattern (5 on 4 1/2") came with 10 X 2" or 11 X2 1/2" brakes. The small bolt pattern parts are getting scarce as hen's teeth and are priced accordingly. You may want to give some thought to having your axles redrilled for BBP and using those brakes because of parts cost. Matches the '73-'76 front discs too.