Trans overheats

Doesnt sound like you are planning to drag race this combo with slicks on it or anything, I think an 11" converter would probably work well for you. It would be loose enough to let a 509 idle in gear without any problems, is very streetable, and relatively cheap in the bargain. Sell that racer converter to someone who needs it. Too bad it wasn't for a 904, it would be perfect behind the 360 I plan to put in my Duster. I already have a 727 8" in my parts pile, but I'm betting there are several guys on here that would LOVE to snap your converter up.