Imitation is the sincerest form of flattery.
Glad to know you've noticed and do hope you know how the knowledge you've left around the internet is inspiring.
And also, would that difference in spring to wheel center be translated to the pivot points for the axle and for the radius arms?
I'm thinking kinda like the drop brackets they used to make for Broncos to get a lift; since the ends of the axle are going to be a bit lower, should the pivot points be lower ?
My plans for the pivots: Use them to compensate for the change to camber by extending the mounts downward as you describe. The other option would be cut and turn. I think brackets put the differential a bit further away from the crossmember and reduces the amount the member needs to be notched.
As far as radius arms, I don't plan to drop them, just a bit of trig there to make the new ones.
I think this axle is still in the salvage yard that i go to. Let me know if you need any measurements from it. I don't know what I can reference them from
but its a complete front frame with axles attached. I would think the pivot point spacing would be the most important.
Don't know if this needs a quantitative measurement, but I'm a bit worried about the angle where the tie rod ends mount to the knuckle. The mounting surface on the knuckle in my mockup points downward at a pretty large angle. Perhaps this doesn't matter, or the drop pitman arm is also angled down to match so the planes swept by the pitman arm and knuckle mounting surfaces are both declined an equal amount below vertical. My "level" is based on the idea that the previous leaf springs would have mounted on a flat surface, so keep that surface level. Doing so angles the steering as described. So if you're out there that's all I'm wondering presently.
I'm hoping to work without pivot spacing measures by welding my wheels at 69.25" between wms and assembling the axle between the wheel surfaces. If the axles need to be flat, this just leaves one place for the pivots to end up. The whole jig can the slid under the van and cardboard templates made for the pivots.
I measured from wheel centers to fender lip before removing the old 2wd setup, so I can just raise axle to the correct lift height based on the wheel centers to fenders on my jig.