I myself am not a Petronix fan. It’s not a high performance ignition. It’s just a different way to trigger the points. So for starters, if your 235 distributor is not up to snuff, the Petronix will not help you, with or without the coil that Petronix recommends. So you need a distributor in excellent working order, not just working, but working to specification.

And if the module fails, and quite a few have, you are stuck so you better have a spare module and tools, or a spare point distributor ready to stab in place of the Petronix.

But let’s just say you want something a little better. HEI ignitions are really hard to beat. Unbelievably reliable and a spark that will blow your socks across the room. Really one of the best factory ignitions ever developed.

Tom Langdon had an excellent conversion but they are no longer available.

Davis Unified Ignition (now Performance Distributors) has a good one. Pricy, but good.

https://performancedistributors.com...1-ci&attribute_pa_color-choice=black

You have Jon G’s above conversion,

also Deve’s conversion.

http://devestechnet.com/Home/HEIgnition

Probably others. But if HEI is not what you want there is an alternative.

Use your stock distributor (in good performing shape) with an MSD 6A or 6AL (the L is for rpm limiter). The MSD unit is what fires the plugs and is a true performance unit. The points trigger the MSD so no voltage through the points so hardly any wear and tear on the points. Years before you would see any wear. Use an MSD blaster coil, or Accel Superstock (black, yellow or chrome). Easy wiring, multiple sparks at idle and through the rpm range until it reaches critical mass and is one big spark. You can hide the MSD, paint the round coil black, and if the MSD ever fails, just swap a couple of wires and you are back to a points ignition. Way better than a Petronix.

Last edited by Dragsix; 01/14/2025 4:56 PM.
Mike