Alright, so about 20% FTW on stock trans. Might go 25% for peace of mind. No way will this be a track truck, only a DD so no need for all out performance.

Also, anyone know off hand what the drive is on the converter bolts in a 06 4l60E truck? I've heard 8mm and 10mm? I guess I could buy both.

Also, with a TB I6 converter does about 12-13 quarts sound right? I've read on the 06+ to use Dex VI and found the Mobil stuff but can only find about 12 quarts so far.

Thanks again - Mike