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**BigBird05** · 02-10-2021, 03:48 PM

I looked it up in the 70 chevy truck manual and it says 4 deg with out vac adv.

02-10-2021, 03:48 PM	#41
BigBird05 Senior Member Join Date: Aug 2019 Location: Cheraw Posts: 1,305	Re: Timing & Gas Milage I looked it up in the 70 chevy truck manual and it says 4 deg with out vac adv.