My dad has a 2007 lbz bone stock his tranny temp will get up to 250 and averages 200 to 210 without a load on it sounds way to high to me (with outside temp at 55 to 60) but maybe I'm wrong. Any advice?
Depending on how far you want to go with this; I have some stout billet single disc converters that will hold 425 hp. They are a lot cheaper.
Do you have them in lower-than-stock stalls?