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Old 07-03-2020, 03:59 PM   #20
geezer#99
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Join Date: Aug 2009
Location: Bowser
Posts: 13,521
Re: Need help with my first 350 sbc

Valve timing refers to the cam being advanced or retarded. That’s a function of when they open/close and not how much they open.
If it won’t idle well you’ll need to adjust running differently.
Loosen rocker until it clicks, tighten Until it gets quiet then leave it alone. Then do the next one the same. Continue until you’re done all 16. At that point all will be at zero lash. Shut the motor down and go back and give each nut 1/8 turn. Wait ten minutes after all are done.
Fire it up to see how it runs.
If all is well slowly turn each another 1/8 turn.
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