A518 46RH rebuild

Well, it looks clean, but I didn’t bother measuring clearances because when I ordered it, I knew it was a flats pump and I have a brand new lug drive converter and I thought I could just put my pump parts into the new housing. The flats drive pump is a larger diameter so my parts leave too much of a gap so I’m back to looking for parts.
Either a larger diameter lug drive if there is such such a thing, or I see how much of a loss I take on returning the converter and getting a flats drive one. I’ve had it for about eight months, so I’m not sure what they’ll do for me. I have some other things too take care of today, but I really don’t want to push it into yet another week.
I needed a new pump because I changed the front drum to one that holds more clutches, but didn’t realize there was single bushing or dual bushing drums, and that affects how it rides on the pump shaft. The book didn’t mention that.