Great idea on the tools, I thought I could just impact that Allen key to remove the pulley but I’ll go get the right tool.Do you have any pics of a 3500 to see where its lifting points are located? That might help.
When I did the PS pump on my "3.2 Stroker" build, I went to Autozone and rented their pulley removal/reinstall tool set. Worked like a charm. Don't think you can do the job without the special tools, with them it's a cinch.