is is possible that the firing order is wrong...or the cap is 180' out.....1-5-3-6-2-4, remember that the crank turns twice to 1 rev
of the cam, maybe timed on #6 rather than #1.....


My GMC has a bad case of ship fitters disease!
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1958 GMC
1956 Chevy 1500 Hydraulic Dump Truck
1952 Chevy 1700 3-Ton Firetruck

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