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Tuning Question
My 70 starts and seems to run Good, except when I let off the gas while driving it seems to backfire once in while. I have timing set at 6 Deg BTDC and the carb was adjusted for max vacuum when I did the idle mixture screws. Do you think I need to adjust timing or maybe carb slightly out of wack? II added an EDelbrock perfomer manifold, and new HEI., new plug wires. MY old brain is thinking timing is slightly off, but also know it could be carb. Just looking for some helpful hints to smooth it out.
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