I would do a boost referenced regulator for the fuel, and give it more fuel pressure for each pound of boost.
This is one place where the 3FE being "dumb" and not being speed density or knowing what engine vacuum is doing would be great.
I think a 3FE under 10 lbs of boost would be very happy.
Turbo fj60 - https://www.youtube.com/watch?v=eMca16T7WZo
That's my plan!