edelbrock air gap divider and FITech

Performer Series Carb Adapter Plate Edelbrock 2732 - Pace Performance Parts

Have alot of guys buy these initially with the thoughts of equalizing pressure its only .0625 for clearance.
I don't think you'll hurt anything milling the divider, but the above is the easier option, and also will tell you if it does anything before you go grinding.