904 Rebuild

"stall converter needs to be replaced as well as most of the teeth are rounded off."
I'm guessing this is the ring gear?These are cheap and easy to replace.

For us to give an opinion with this new info, you need to separate out the various costs.IE; the RnR is $www, and the tranny build is $xxxx, and the TC is $yyyyy, and the ring gear replace is $zzzzz, etc