Sounds like a well built engine. What compression and cam?
A pair of 301E turbos will only move enough air for about 750 HP. That's a lot of hardware to deal with for only 750 HP. The 8-71 can easily deliver that much HP with an intercooler and is a much simpler installation. A single centrifugal/intercooler/blowthrough carb on that engine can deliver 950 HP and is also very simple in comparison.
I don't blame you for taking the twin turbo stuff off. I've been down that road too and decided against it.