Back when I started my LGH and 6L90E project into my 69 C-10, nobody would tell me that the trans could be built to handle 650 to 700 hp. with maybe 1250 lbs of torque. Of course that was 6 years or so ago, so maybe somebody can now. A few months ago, I saw a near stock LB7 4WD truck with a 4L80E running in the fives. Not having to use my Allison would have saved me a lot of weight and a lot less cutting and fab work and a trans tunnel that wouldn't be so massive. I still have the 6L90E if you need it. Good luck on your project .