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Well, time to close out this thread, The inoperative OB switch circuit has still not been solved. I have traced the non-original ground wire and found it soldered to a small gauge red/br wire behind the front fuse panel which is no doubt the ground circuit to the fuel pumps. It is a well done modification, just not sure why it was necessary. Probably because it was easier than trouble shooting the OB circuit. I will keep after it and hopefully one day the mystery will be solved.
I have finished installation of the new vacuum canister and it is working well. The problem with the advance plate and star wheel moving together was not repeatable. The ignition timing is right at the TDC notch on the fan hosing at idle. I ended up moving the distributor one tooth and now it sits at the other end of the adjustment slot which I slightly elongated, There is now enough adjustability to retard or advance. I believe lack of a working advance mechanism was the cause of my original problem with hesitation upon opening the throttle. Not a cheap solution but it is well made and supported and there is no alternative if the original canister is unrepairable.
I am now in the midst of dividing the fuel pump circuits to provide the relays/pumps each its own dedicated 12 v supply. I hope to make it as original looking as possible. Also ordered two new relays from the Canadian company that is making round relays equivalent to the red relays in our cars, will transfer the red plastic caps to complete the look.
Will post pictures when finished. Thanks for all the help received here, not possible otherwise.
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