Joe your experience matches my expectations. Buy a new rebuilt 700r4 and maintain it right and I'd expect it to work. And I have pulled a trailer using a small block and 700r4 and done okay. It will hit 190,000 in the next few days.
Running an overdrive automatic behind the Cadillac would require an adapter plate and I don't want the trouble or expense. The 454 needs to be moved and the Cadillac doesn't...
38 I don't want to pay for a 4L80e. Just the control box by itself will cost me what I expect to pay for a 700r4. The transmission will be thousands more. I have priced this option.
I'm building this truck on the cheap and while I won't skimp on safety and control aspects, this seems like a place where a realistic look at my needs means I can get by with a cheaper option.
Which part of the greater Seattle area are you in? I'm on Bainbridge Island.
