So the bottom pulley stopped this from flying off ?
No, there is a lip on the center part of the balancer that won't allow the outer ring to go forward! It's made exactly like the o e balancer from Mopar.
'63 Dodge 330 11.19 @ 121 mph Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs. 10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.