The 72 and back one piece and two piece bushings for the struts are are available at any Napa in moog. 72 back is a different PN# than 73 up. the suspension kit I bought for my cars came with the wrong bushings. They sent me the correct bushings when I made them aware of their problem with install. The bushings they sent me were one piece poly's. The two piece moog have a collar built into the rubber that seats into the hole in the K-member plus a sleeve that slides onto the rod. The poly does not have the built in sleeve that slides into the K-member hole. this causes the lip on the bushing to sheer and move up and down.. always put the male part of the bushing in the front facing back. This keeps the strut centered in the hole when applying the brakes. The strut is always pulling on the rubber bushing. It only pushes when you apply your brakes in reverse. On all polly bushing lowers the bushing slides on both inner and outer sleeves. So there is no way to pull the lower into place once the strut rod holds it back because its to thick.
Yes the two piece bushings can be used with any year suspension parts as long as you use the correct strut rods from 73 and up