gr8twhite,what engine mods are you running?If you are making big horsepower numbers a shift kit might not be a good idea on a stock tranny.The Yank 3000 is a better mod anyway.

 

This is what have whitt1, a 2000 Silverado 5.3 auto. With a radix,true dual exhaust with 2 21/2in flowmaster delta force mufflers,no cats,o2 sims,jet scu2000,flex a lite fans,4.10 with eaton e-locker.I changed the small heat exchange ratiator to a perma cool 6 pass oil cooler with a 1250cfm fan.