I had the EZ on my BBC in my Chevy truck. It ran decent but was never stellar. I did put it in with a lot of fore thought as I am no novice with EFI systems. After some tuning and driving it got better but I eventually went back to the carb and HEI. Simple is best.

Take heed to everyone's suggestions here as we have "been here and done that"

You will get it sorted out. But, comparing apples to oranges, simplicity will always win me over. Just my $.02
The EZ-EFI is a good system but my next iteration will be a mill and the associated OEM components that work in unison. Enough of the "bolt on" trial and tribulations crap for me.
Good luck,
Bud