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**PGSigns** · 03-22-2017, 07:31 AM

Its not really a tooth off if you can set the timing. Usually when its off the vacuum advance hits something that keeps you from setting the timing. How are you checking the total and initial? Do you have a tape or using a light with advance on it? What are you using for a vacuum port? Also the back fire sounds like a wire crossed. Have you verified the firing order? What weights and springs are in that HEI?
Jimmy

03-22-2017, 07:31 AM	#4
PGSigns Senior Member Join Date: Jan 2011 Location: Hayes Va Posts: 4,569	Re: Timing Vortec Its not really a tooth off if you can set the timing. Usually when its off the vacuum advance hits something that keeps you from setting the timing. How are you checking the total and initial? Do you have a tape or using a light with advance on it? What are you using for a vacuum port? Also the back fire sounds like a wire crossed. Have you verified the firing order? What weights and springs are in that HEI? Jimmy __________________ 60 to 66 Chevy and GMC window decals http://67-72chevytrucks.com/vboard/s...d.php?t=661131 Good friends, good food and a hotrod what else do you need? 1966 BBW long fleet Daily driver 1965 BBW short fleet Sold and going to a good home 1965 Suburban 2003 3500 Duramax 2005 Ultra Classic