It's supposed to work in a small block bellhousing/727/904, so it should fit a big block the same way. The only mod you supposedly have to make is drilling out one mount hole on the starter. One of the mount bolts on it has a bolt that comes in from the rear on it's stock Gen 3 Hemi configuration. You just ream the threads out of that hole so you can use your stock bolts for your bell. I'll double check with my source, but I'm pretty sure that's all you need to do to make it zing.