So here is a picture of the front suspension mock up.
This is a 12" forward relocation from stock of an A-100 van axle.
With this design as indicated in the photo's there is a 7.5 degree lay back at the kingpins.
There's really no way to know how this will react once everything is loaded with weight.
I think the only thing I'm going to do different than what is pictured is to make the slider bracket at the rear so it can have shims installed between it and the frame rail that would bolt in thru a bracket welded to the frame.
If ride height is an issue I can also use a tapered spacer between the springs and the straight axle at a later time.
So far I'm happy with how easy this installed and with using the greasable bolts at the front and bearings at the sliders it should work well.