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Re: Idle vacuum - why only 10 inches?
I did, but low steady vacuum just comes up as late valve timing, which I don't know how to check short of degreeing the cam, and I don't want to pull the motor apart like that if I don't really have to. If I could confirm it had to be fixed, I'd go for it, but it's a lot of work to rule out a possibility...
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1970 GMC Sierra Grande Custom Camper - Built, not Bought
1969 Pontiac 2+2 427/390 4-speed Coupe
1969 Pontiac 2+2 427/390 4-speed Convertible
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