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69a · 12-17-2022, 04:32 AM

I've modified 3 GM distributors. One early points one with the window in the cap to adjust the dwell. And 2 big dia. HEI's. If I was going to modify another one I would go to a GM style "Progression Ignition" they come in small and large dia. About $600.00, but fully programmable with an app on your phone. And has a port for vacuum line. My brother has one on his '76 Porsche.

12-17-2022, 04:32 AM	#28
69a Senior Member Join Date: Aug 2020 Posts: 326	Re: chevy dizzy for flatheads I've modified 3 GM distributors. One early points one with the window in the cap to adjust the dwell. And 2 big dia. HEI's. If I was going to modify another one I would go to a GM style "Progression Ignition" they come in small and large dia. About $600.00, but fully programmable with an app on your phone. And has a port for vacuum line. My brother has one on his '76 Porsche.