Sorry for the very long post
So today I borrowed my friend's milling machine to 'fishmouth' the spindle axles so I can weld them to the spindle bore. The OD of my spindle bore is 1", and so is my axle (I just cut the extra off of the 72" that I bought for the rear).
So we used a 1" 4-flute end mill and drilled through the axle after centering it. They look awesome, so now I just have to cut them down to the right length and weld them on to the spindle bore.
I also made a crankshaft puller to reassemble the engine. Basically, this sucks the crankshaft into the main bearings without having to hammer or force it on. It makes sure the crank stays true and the case halves aren't twisted or deformed in some way.
You can buy a tool for this, but it costs $60, plus an adapter for the specific engine. So, I made a tool that works just as well for $5 with 1-3/8" tubing, 3 washers, 5/16" all-thread, a metric nut for the crank, and two 5/16" nuts(one is a long nut). I already had the tubing and washers.
I silver brazed the metric nut to the long nut, so one end screws onto the crank and one onto the allthread. Then I will just put the tubing over the crank end and run the all thread inside the tubing, with washers on both ends. The other 5/16" nut goes on the thread above the tubing, and when I turn that in, it pulls the crank through.
I tested it by putting one of the old bearings back onto the old crank. It worked really good and wasn't hard at all
(last two pics is before and after pressing bearing on)