I couldn't use My ATI damper with a Indy cast aluminum front cover. The dimensions of the thick casting all around made it too thick and the damper rubbed before pressed all the way on. I had to go back to a OEM style front cover to clear. If you do purchase a ATI damper get the BBC bolt pattern center hub. Much easier to get front FEAD accessories and mandels for it that way. Mine was a BBM Bolt pattern and I wound up making almost everything for my Fead on the front of my HEMI.