Stop in for a cup of coffee

Almost got cluster wired.
Guy shows up with a vette, 1980.
Cut off the egr top to make room for edelbrock carb. Cant seem to get it to run right. Paid a guy tons of money and didnt figure it out. The way it would clean up at higher rpms got me suspicious. Grabbed the water squirter and proved my theory.
Letting him pull it off and bring it to me. 5” vacuum at idle means huge leak. Its regurgitating exhaust into intake for sure.