Fuel starvation w/ 3/4 tank? Really? That seems odd.

I'd start by investigating the cause of it. WHY is there fuel starvation with that much fuel in the tank?

Have you actually experienced the problem yourself first-hand in YOUR car? If not, I'd let the thought simmer until you do. No sense fixing a problem that you don't have.

If it turns out that you do need a surge tank, look to places like the MegaSquirt forum for info. Converting a car from a simple non-return carb setup to a modern full-return fuel injection system often requires the use of a surge tank. Lots of info to be found in that community.