Originally Posted by Dragsix
I am sure you are getting that vacuum but that port does not seem to work well. I would still try full manifold vacuum (side of intake manifold, where vacuum wiper hose would go) and see if the distributor is moving pretty good when you blip the gas.

Thanks Mike. I'll check that out next.

1951 Chevy 3100 1/2 ton (1957 235, 4 speed, 411 rear)