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geezer#99 · 06-09-2022, 12:34 AM

My old 67 and 65 both had hei’ s and I had them at 14 initial. I live at sea level.
If you live at higher elevation then your motor might tolerate a bit more than that.

06-09-2022, 12:34 AM	#16
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,531	Re: Tired Straight-6, upgrade to V8? My old 67 and 65 both had hei’ s and I had them at 14 initial. I live at sea level. If you live at higher elevation then your motor might tolerate a bit more than that.