Re: 250 HEI Timing, vacuum advance question
From everything I've read, inline sixes don't like a lot of initial advance. That is an A on the timing tab not a 4, stands for "Advance". If you connect a timing light and watch as you turn the distributor counter clockwise you will see the mark move toward the A. I don't know the range of my vac advance, but it is the stock distributor with a Pertronix Ignitor.
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70 C/10 SWB 402/TH400/3.73 "The Needy Beast"
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Owner installed options:
Front Sway Bar
Power Steering
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Sniper EFI
2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear
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