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Re: Timing Vortec
Maybe you need to time it by 'ear'.
Advance it until it idles nicely and then test drive it. If it doesn't ping then try a little more until it does then back it off a touch. Then put your light on it and see what it reads. Leave the vac advance plugged for this test.
How did you prove your timing tab/balancer were accurate?
What did you use for a piston stop?
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