Above is what all those brackets look like once I hacked and ground away at everything that looked like the wimpy stock axle.The old axle was built to a uniform distance from the square tubing, with the pumpkin flange, and the vertical square tube both plumb. I built two more legs to get the whole contraption level, plumb, and true. That thingamajig in front is some scrap 2-1/2" muffler tubing welded to some other scrap built to the proper elevation(hallelujah for level garage floors).
I could then square the thingamajig up to the square tube, and mark, and slowly grind the brackets to fit. Action shot of the thingamajig , well, in action. And here's the whole mess waiting for final alignment and tacking. I stopped there to think a bit about pinion angles. Anyone have any idea? I'm figuring 2-1/2" -3" drop in the rear, but its getting a new engine and transmission, so everything is up in the air. My first inclination is to just set it plumb to the jig, which is how the stock one was set up.
That is the AE86 axle that is marginally too wide, and blown to heck for anyone who might be wondering.