Best deal on a 904?

I ain't done a ton of transmissions. I've done most every domestic three speed, one AOD, and like three powerglides. I'm gettin ready to tear one of these slant 6 904s down and see what's up. I may stick that in Vixen with a semi tight 4500 converter and RMVB. Time will tell. If I am successful pushing the driver's side of the transmission tunnel over about an inch or so with my port a power, I'll sling the A230 in it and it will be a column shift three speed forever. It's REAL close to fittin. I think I can do it.
Transmissions never interested me. Like rebuilding a starter. I don't want to do it. Looking forward to more vixan updates :)