I used to have to crank up the pressure when running electric with the rupert also 7lb wouldnt cut it ... went belt drive and never looked back

alky carb
 

rupert doesn't like for you to tweek his carbs. dito on 3lbs ile but I ran mine to 10 but 9 should do fine . friend had big berrygrant electric pump on his dragster when he went to alky he said it felt like it was laying over on top we put my belt drive on it picked it up 3 hts. in the 1/8

Call BLP and get yourself an internal bypass belt driven pump....they are so simple and easy.