If all you are looking to do is eliminate the vacuum advance, and don’t want the vacuum canister, cut off the canister, spot weld the two pieces of the octane selector plate and the advance slider together, then dress it down all nice and smooth. Now you have just a clamp arrangement (bolt the selector to the block and clamp distributor, you can still adjust the distributor for some initial timing) and the mechanical advance will provide something usually in the 12-14 distributor degree advance (24-28 degrees at the motor at full advance). Not a great set up for a lot of street driving but workable for a race motor.
On the other hand, if you are looking to have the Petronix act as a trigger for say a computer controlled spark, that is one way to use the 235 distributor with just mechanical advance. If that is the direction you are going, I would love to hear how you are going about it. Be nice to see something new in 235 ignitions.
Last edited by Dragsix; 12/26/2021 8:15 PM.
