got a little more work done, welded on frame extensions (2x4 1/8 wall). i will trim them later. I also figured out my shackle mount locations and got em mounted. welded on spring hangers. everything still needs to be finished welding, add gussets, etc, but i wanted to get the rear axle in to make sure i liked everything with the weight transfer. I'm liking the shackle angles, and my caster angle is 7 degrees, perfect!