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Plug no.1 had 200 miles on it and was not fouled The GM distributor is all plastic the ears that hold the cap on broke. So we replaced the complete distributor with genuine GM. set the cam timing at +2 We used new aftermarket plug wires. And new AC delco double platinum plugs. We used the...

2000 chevy 454 OBS K3500 Crew cab dually truck Started out the thermostat needed replacing because it only got up to 110 degrees. Which caused us to change the original heater hoses dated 1999. Then decided to change the spark plugs (badly worn) then also plug wires. Broke distributor cap and...