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My 66 Service Truck Build Thread

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05-10-2022, 07:43 PM	#32
LostMy65 But Found Her 25yrs Later! Join Date: Oct 2010 Location: Oregon City, Oregon Posts: 10,517	Re: My 66 Service Truck Build Thread Did a compression test. #6 is about 10 psi less than the others. I squirt some oil in there and it's still the same. Sounds to me like a valve issue with #6. . I put all new plugs and wires on as my last check for the back fire issue. But it makes no sense to dump money into gm Goodwrench heads, so I'll either pull them and try some lapping or buy a nicer set. __________________ I lost my 65 - Found it 25 years later: http://67-72chevytrucks.com/vboard/s...d.php?t=426650 66 C20 Service Truck: http://67-72chevytrucks.com/vboard/s...d.php?t=428035

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