help needed with 904

It's funny until I know something about this damn thing I don't know anything about it LOL. For all I know it could be in perfect running order but the part that's killing me is that I have it all out. I don't want to fix it after I put it in if there's anything to fix? LOL


I hope you get this figured out, I need to check a 904 for my next build, I have been running 4-speeds for the last 30 years, but this next one I plan on running an auto.
So I am in newbie territory also.