Retainer size for np435?

So still searching... Found an np435 bellhousing, going to see if my 833od can be made to work behind this bell and then bolt up to my 5.9. The issue I am having is trying keep my 833, yet also have my magnum beer keg fuel injection. I found a post on moparts, where a guy made it work with a redrill and a metal plate. I found a bell, should have it early next week. The poster claimed the retainer covers were the same size. Can anybody give me the size to a 435 retainer? Thank you