SP2P 2bbl worth the effort?

And being that the exhaust partially neutralizes the fuel/air charge and increases enthalpy of the mixture, you can run a very lean cruise circuit while the EGR is on. Going with programmable EFI makes it work even better and yields larger gains, but for the cost, it better be a big difference. Affordable Fuel Injection would be my go to, all over the counter nineties ford based system.