Slant to 318 mounts for 72 Duster

early A (63-66) have a different k-frame and different mounts.

for your 72 you need the 67-72 mount type. A member posted these a few days ago and these will work on your 72 duster.

http://www.forabodiesonly.com/mopar/showthread.php?p=1970778053#post1970778053