For high performance (racing) I use a double pumper, though a proper FI system is going to be better. They are just very costly and are generally 100% custom. Not too many people have the brains to design and run one of 'em. Holley Pro-Jection, Edelbrock MFI, etc. are not good enough for high performance.

And my double pumper isn't up to 60s specs, either. I take full advantage of modern manufacturing tolerances and technology...I'm sure you do to, though you may not know it