Well, at this point I'm not 100% confident that I installed it completely correctly as there's some some wobble to the tone wheel, but anyway, I bought a pre-cut tone wheel from a website called Miller's Mule, I believe it was 7" diameter. This welds to the crank pulley.
I then made the bracket for the crank sensor using some 3/4" square tubing to connect to the pan rail. You can do radial adjustment with washers on the pan rail and axial adjustment on the sensor itself.
Initial Mockup:
I had to cut a relief for the oil pan lip which isn't shown here and the dual groove pulley is a little different so I had to use some more washers
Installed on the car
Also here's the status as of Today. Need to button up all the stuff in the back at the gas tank now and then it's on to wiring.
I also will comment that the whole heater hose/gauge sender hookup at the intake is a serious compromise. I'm not sure I had too many other options.