Engine timing mechanical

#1- Verify the location of your timing marks. Bring #1 piston up to TDC on intake stroke measured at the piston. Then look at timing marks - are they perfectly lined up? If not, then something may be wrong with your pulley. #2- was your distributor set up on a machine? When does advance start? You may have too much advance at idle or vacuum advance plugged into wrong carb port.