I did the hose trick and i also tapped the end of the dist tang over to take any play out of the slot, i suppose the clamp would give you peace of mind, great tip though Bigcube.
69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200# best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft best 60ft 1.36