Author Topic: 1975 .060 plug gap(!?!)  (Read 6113 times)

Offline Irish_Alley

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Re: 1975 .060 plug gap(!?!)
« Reply #15 on: December 06, 2010, 08:38:53 PM »
Lol sorry missed its a 75 its only the 3rd letter
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Offline 1979C20

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Re: 1975 .060 plug gap(!?!)
« Reply #16 on: December 06, 2010, 10:25:35 PM »
My plug gaps were spec'ed at .045". I haven't tried to change them to any more or less. and I haven't looked anywhere else for specs.
1979 SCLB C20 Q-jet 350 SM465 14b F.F. 4.10 G80
1989 GMC Suburban V2500 TBI350 TH400 4in lift 35's 14b SF