Hello folks, A&A Corvette is building me a nice engine that will have about 800HP on a long body all wheel drive Escalade weighing about 6000lbs

I have heard so many different opinions that I am lost.

I was told 4L65E cannot handle more than 500HP under such a heavy car reliably so go for a built 4L80E conversion. So I did. Later I heard thats BS and a rightly done 4L65E can handle it no problem.

Now I would much rather go with the 4L65E so I can avoid having cross members and drive shafts made. But I have no clue who is telling the truth.