ATS is a good choice. Give Clint a call. I don't know how many miles you have on your truck, but just the TripleLok TC and an ATS Valve Body will vastly prolong the life of your trans.
I got the complete ATS Stage IV and it is the best thing I ever did to my truck. I had 107,000 miles on it, and the stock TC was starting to slip, so I needed the complete rebuild. But if your truck is a low mileage truck, you can get just the TC and VB and be set! Clint's number is 800-949-6002 Personally I feel ATS has done the most thorough job of engineering of all the trans builders. If you are near them, go by and check them out. You will be impressed!