Re: '60 GMC 4x4 Long Fenderside
I learned about the vacumm guage trick from an old motorhead, they are not very expensive to buy $20-$30 if I remember correctly.
The trouble was I kept trying to set my timing by the book and the engine was running like crap. Once I dialed it in with the vacuum, it ran like a champ.
Good luck, hope this works better for you!!
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