Any suggestions on an efi system for a 540 to make 650-675 hp?

I am running the stock EFI from a 502 with a procharger and 5psi of boost making 693hp

Cab:

We have two complete efi systems in stock for 540 BBC use, that are complete with manifolds, injectors, fuel rails, wiring harnesses and Mefi computers and gaffrig flame arrestors , ready to run and will make easy 650-700HP on right 540 engine. These are used take-offs we can powder coat your colors. Let us know if you are interested.
Best Regards,
Ray @ Raylar

What kind of cost on a set up like that? I currently have the MEFI 3 and most other stuff as my engine is FI. We are moving to a carb over the winter as the stock MAG MPI is stifling the engine.

What lb. injectors? What does it sell for? You said it is used. What kind of system is it?