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Unfortunately I recently installed a GM HEI module when I switched from points and I havent had any luck finding timing information. With the old points system I would set it 5 BTDC and it would run fine. With the HEI it sounds best around 20-30 BTDC (not really sure cause the marking plate only...

I just got done putting a super six setup on my 69 Valiant and would like a professional to look over my work. It starts and runs fine but stumbles when in gear; I think the timing and air fuel ratio need to be tuned. I haven't had many good experiences with modern mechanics; I was hoping to...