Thank you everyone for the input. behind the scenes of all this I had long been wanting to do a restoration project and now with towing a TT in mind I have found myself wondering. I have two projects I have been fantasizing about... The first is I have a line on a 1969 Ford F250 2WD camper special with a blown engine sitting on a farm. It has a 1 ton rear end. I want to put a Cummins 5.9L 24 valve in it and pull with that, or just show it off.
The second fantasy is to take my 2003 Ford f150 King Ranch I have sitting with the 5.4 triton blown, and apparently I can put a Cummins 3.9 (called a 4bt) into it as it makes for a nice fit. This will give me better towing, mileage, etc, and allow me to keep my beloved king ranch which other than a blown engine is a great truck.
Either option allows me to keep the Avalanche 1500 for what it's meant for which is GM's claim to fame for trucks as a good vehicle for a date night and little more. (that's my GM opinion sneaking out).
All the above of course costs money, but I have wanted to do a project for some time, and I also have my f150 king ranch just sitting there... Guess I'm back to square 1