Rear Axle Position.

You could take in for a 4-wheel alignment; the sensors will tell you what's going on.

Yes, that would be a safe way to do it, but body is in the rotisseries, so I want to get this as close as perfect as I can now.
To determine rear axel is angled with the body, I took this stainless steel rod, and hook in to passenger side rear k-member bolt hole.
20170811_161343 axel angli.jpg

I measure to the drivers side leaf spring center bolt, since this bolt will determine the location of the axel, and I donĀ“t have to spend time to adjust the axel assembly in exact position side ways.
This numbers was well in line with my first picture in my tread, and show (to me) axel of driver side is behind.
20170811_162912 axel angli center bolt.jpg

I made this block of 10mm alu to move center bolt back, and it was just about enough...
20170811_162653 axel angli block.jpg

To get some Rear Steer, I will drill a new hole in the drivers side leaf spring perch, to move axel 3/8" further back, witch of cause will result in passenger side wheel ca 1/2" front.
20170811_163935 axel angliment perch.jpg