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Jimnh

HELP - Pertronix Wiring for '76 CA Model

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I am attempting to wire a Pertronix to my late production (3/76) '76 with CA emission control system (disabled by Prior Owner). I know how I'm supposed to connect the 2 wires from the Pertronix to the coil (mine is a black mounted up front, so I know I have to extend the length of the Pertronix wires to reach it, or move the coil closer); but my question is what to do with all the existing wiring going into the coil. There are 2 spades on the POS terminal and 2 spades on the NEG terminal. The only wire coming from the existing (pre-Pertronix) distributor is a black wire from the condensor to one of the POS spades (my tach wire is also connected to this wire at the condensor); the other POS spade has a single wire leading from the carb (Weber) to it, and which does not seem to be part of the original harness (i.e. seems to have been added by the PO); there are three wires connected to the 2 NEG spades (2 on one spade, one on the other), all of which run in a blue jacket back to a box mounted on the firewall above the steering column, and which seem to part of the emission control system (since they are wrapped in blue like all of the vacuum tubes that are connected to the three valve/relay pots mounted to the center firewall. So, my question is, do I just disconnect all of the "blue jacket" wires from the coil, along with the black wire that ran from the pre-Pertronix condensor, and just connect the red and black wires from the Pertronix, and that's it? If so, then what do I do with my tach wire which was connected to the black wire that ran from the condensor (do I splice it into the black wire from the Pertronix, or just run it directly to the coil (POS? or NEG?), or somehow otherwise connect it to the distributor body where the condensor used to be)? Any input would be greatly appreciated. Sorry about the length of this, but I wanted to be clear, and I couldn't find any answers in the Forum that addressed what to do with the emission control wiring when wiring a Pertronix. Thanks.

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You cannot scrap all your existing wires. You do need the hot lead from the ignition, tach wire also stays, the wire going to your carb is probably for an electric choke ( which if it were me I would relocate to a different source of ignition switched power).

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Thanks. Now all I have to do is figure out which wire is the ignition wire, and I suppose I can do that by trial and error. I would assume that it must be one of the three wires that I presently have running into the two spades on the NEG side of the coil. Is that correct (i.e., does the ignition lead feed into the NEG side of the coil)? If that is right, then was it wrong for the PO to hook the carb feed into the POS side of the coil (i.e., if you're suggesting that I hook the carb feed directly to an ignition source, and per the previous sentence the ignition feed to the coil is to the NEG terminal, but the carb feed on my car feeds from the POS side of the coil, then does the polarity of the source into the carb really not make any difference?)?

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