So here's my plan.
I found a few eBay sellers with blower parts for very reasonable prices
I'll need the blower front cover, the blower rear cover, the snout, the pulleys (which I'll probably buy two to start mock up with them change later) and the adapter to go to the 8v71.
So far I've purchased the adapter, this is already drilled for the angled bolts and includes studs gaskets etc.
I mocked up the stuff a bit.
I'm contemplating cutting off the whole water pump setup to save space and run an external pump, it wouldn't be hard as the pump is cast into the front cover and I'd just need two block off plates to cover the holes and put AN fittings up to them or a spot to clamp a hose. This would also allow me to run only the crank pulley for the alternator (too bad I didn't get the magneto lol)
Turns out they sell new old stock 8v92 blowers for about 600 so I'm hoping that will bolt up the same way the 8v71 does as far as I can tell the engines underneath are the real variance not the blower itself.
Here's the parts needed: