Personally, I would get a modified valvebody. Maybe a better torque convertor. The modded VB will improve oil flow through the transmission, including the lube circuits. With 10k behind you, it should be doing a better job of cooling. I have the stock oil pan and only the stock coolers on my truck. Having a Goerend Brothers transmission, it runs quite a bit cooler than my stock transmission ever did. Only time it goes over 200*, is when backing up and the tc lockup clutch is not engaged.