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Old 08-20-2010, 08:40 PM   #2
LandonL
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Join Date: Nov 2009
Location: Georgia
Posts: 440
Re: setting timing in 68 c-10 with 250

You sure it was the compression stroke? Set the timing with vac advance off, as you probably know. If the damper mark lined up on the 0, you'll probably be targeting 4 degrees before, as thats the stock setting. Others set to 12 I believe. The vacuum advance may be bad. I'm no expert, but someone else may know.
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---| 1967 GMC Stepside |--
250 L6 .030 over

---| 1985 Porsche 944/1 |---

Build Thread: '67 GMC
http://67-72chevytrucks.com/vboard/s...d.php?t=378640
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