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Does wire position change when switching from points to hei on a 1970 Chevy 350?
Wiki User
∙ 13y ago
No...whether points or HEI the firing order is 1-8-4-3-6-5-7-2. If you happened to mark where the rotor was pointing on the old dist before taking it out and installed the HEI in the same location it should be right on. If not, bring the engine to top dead center. You can verify this by looking at the timing marks on the harmonic balancer and the pointer. Now install your distributor and rotor. Whatever plug wire on the cap that it is pointing to will be your #1 plug wire. Then wire the rest, clockwise, in the order given above. You will still need to set the timing. If by chance it absolutely will not start and/or pops or backfires when trying to start it you could be 180 degrees out. Meaning that the engine was on the exhaust stroke instead of the compression stroke when the timing marks were aligned. If this is the case move each plug wire on the cap exactly across from where it is. In other words, if the cap were a clock and #1 plug wire was at the 12 o'clock position you would want to move it to the 6 o'clock position and follow the firing order from there. Hope that gets you up and running.
Wiki User
∙ 13y ago
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