BMR 64-72 A-Body Driveshaft Safety Loop Front - RedProtect your 1968 1972 GM A Body, while complying with NHRA safety rules with a Driveshaft Safety Loop from BMR Suspension. If you drag race your G Body, chances are you need a driveshaft safety loop to be NHRA legal. Built from 1 4 inch laser cut CNC formed plate steel, BMRs DSL410 Driveshaft Safety Loop bolts on using four drilled holes in the floor pan. This design gives you a solidly mounted loop that will stay in place should a driveshaft or