Thanks John. The donor frame sits between the rails and won't work with the curve of the 3/4 ton frame. I just wanted to see some examples of how it should be assembled on a 3600. I do have the SM420 and am about to pull it to go through it, so I thought it might be a timely upgrade. Although I do occasionally use the truck to haul stuff, I'm not intending on using it for dumping large loads, it would be more for show at events.
Any one with good pics of what this setup should look like? Thanks!