If you get a stall, definetly get a cooler. A larger stall converter builds more heat than the factory unit. Especially in town or slow driving because it slips alot more. I had a 3000 converter put in awhile back and they didnt tell me I needed a cooler. I soon found out. I burned up that trans in under a year. But it wasnt the best quality built trans in the world either. My advice, get a cooler, its like insurance for your trans. Good Luck,
Josh