Drag strip launch problem

will try the demon on the car and see if this fixes it . if it doesn't it could be the fuel sloshing . will also move the fuel filter . The only way for me to get rid of the foot and a half of 5/16 is to replace the pump again that will be last because i am not running out of fuel at top end . Timing at 34 deg plus vac advance i think was 12 deg . tryed unhooking vac advance and did not change the the bog. Thank you to all . will have to do more testing