When I switched to Pro Comp Xtremes 40's and had them road force balance and the highest number was 21, no way should a 37" tire be at 31 on a road force balancer
Jack up the vehicle, hold a piece of metal, plastic or whatever ( clamped onto to something)next to the tread and spin the tire. Watch to see the airspace between the tread and object. I had 40" patagonias that were horrendous and did what I just described. 2 fronts were 3/16" out of round, 1...
Take the inner fender you ripped off and cut that part off with tin snips. Closely follow the existing lines and cut carefully. Then use a file to take off the rough edges and use gorilla glue to glue to the fender. the cut section will still have a tab on it to insert into the body and place to...
Add a little more money and just go with 1 ton axles 60/60, 60/80 etc etc. You are close to 1 ton money with all those changes you are planning on doing and in the end you still have D44's.