Light Throttle Miss - EZ EFI Multiport

[old66tiger]

I have the EZ EFI Multiport system on my 461 Pontiac and when running the car down the road and I have a slight miss under light or constant throttle. You can feel the hesitation and hear it in the exhaust. I am running the MSD distributor and the MSD 6AL digital box. Wondering if running the MSD box off of a points dizzy would be better than running the MSD box off of the electronic unit?

I have tried with and without the vacuum adv and it gets a little worse with the vacuum advance connected. I am running the AF as low as 14.0 to get rid of some of the stumble and it seems odd that I have to run it so rich to get the light throttle response to run right.

I have a new set of wires I am going to try.