Update
Off idle was what I noticed yesterday. Today it's about 2k and surges. Couple hundred rpm. I tried moving my vacum line and really haven't noticed much. Thinking of getting vacume gauge and adjusting carb? Right now the screws are at 1 1/2 turn
Thoughts... I just installed a edelbrock performer plus cam, set timing at 14° per the sheet. Runs good smooth.. ONLY barley of idle small flat spot then it kicks back in. Holley 650 cfm... Kind of off doesn't hamper much. but feel like the flat spot shouldn't be there. Whats your thoughts