On the side pipes...... Check Roscoes web site.
I put my body on to get them looking the way I wanted. If I remember right the pipe on the drivers side sits further from the frame than the passenger side. Or the opposite.
I used 2 hunks of steel that came with my kit. I dont know if that was their intended spot but I felt it worked good. They were probably 1/2" stock 12" long by 1" wide.
You can see my mounts in this picture but probably not enough to help.