Pb booster size on rb 1987 4×4 w150

HEY GUYS,

CAN ANYONE ADVISE WHAT OTHER TYPE OF POWER BRAKE BOOSTER CAN I USE ON A 1987 DODGE W150 4X4 WITH A 440 NOW IN PLACE OF 360? THE LEFT VALVE COVER HITS THE FACTORY BOOSTER AS MOTOR SITS HIGHER....I POUNDED THE COVER AND DENTED BOOSTER TO GET SOME CLEARANCE....BUT A SMALLER BOOSTER WOULD WORK BETTER..........

DART OR VALIENT OR SOMETHING LIKE THAT? THANKS...jEFF
Author: 440guy