Nope, the '72 340 cars were still using the 8 3/4 rear end hence the small bolt pattern and they were using the kelsey-hayes disc brakes which =sbp. In '73 the 8 1/4 rear was introduced in the A bodies and the newer single piston disc brakes which = lbp.
So you have '72 small bolt pattern center which could have been on a slant six car all the way through a honkin 340. You also have the large polt pattern center for '73 and later. I have a '74 Duster with a 198 cubic inch slant six with the Lbp ralleys and same centers because it came with the newer single piston disc brakes.
hope this helps....
Not necessarily....for instance cars with front drum brakes, which =sbp, in '73 and later that were optioned with the ralley wheels would have used the sbp centers.
Yep!!! For the SBP cap sequence, here is the general rule...
1970= Cone style with light argent painted relief
1971=Cone style cap with dark argent painted relief
1972 and up= Acorn style with light argent painted relief
You may find them painted other colors, the acorn style may have a removeable center, but above is the way they came from the factory in their respective years!! Hope this helps, Geof