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....