Edelbrock Air-Gap / Electronic Injection

Your English is much better than the young kids who type with their thumbs and don't know how to form a sentence.

Did you fabricate the MPFI yourself or is there a company there that does it? Either way your setup is tough. It looks like you welded (TIG?) custom aluminum blocks to the intake, which isn't easy. I would think a dual plane would work fine with MPFI. As I understand, the main advantage of the dual plane is to give longer intake runners for a better "tuned port" effect at low to mid-range. A single plane is better for max rpm. It does affect the vacuum signal in a carb, but that is a secondary effect.

Was your earlier system the Holley Pro-jection 4D or the Commander 950 TBI? I have the earlier Pro-jection 2D on one car, but it doesn't work great, I think because not enough sensors (just throttle position and rpm). I have a Commander 950 to try when I get a chance.