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Spark Plugs

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Old Sep 22, 2008 | 09:06 AM
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Jim.Biron's Avatar
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I''ve got a 1970 442 455 motor with a HEI distributor. Can anyone recommend spark plugs and gap for that? It a non modified motor with a stock GM HEI unit.
 
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Old Oct 2, 2008 | 07:30 PM
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0.35 but not any bigger.
 
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Old Sep 18, 2009 | 12:50 AM
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with an HEI distributor you SHOULD be able to get away with a .045 gap provided the coil is good.

.035 is the max I'd go with a points setup and a stock style coil.
 
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Old Sep 18, 2009 | 03:34 AM
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You must remember that they went .080 stock. Now I in now way think that's a good idea. I'd go .040 and be done with it.
 
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