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- - Spark Plugs (https://oldsmobileforum.com/forum/442-30/spark-plugs-2254/)

Jim.Biron

09-22-2008 09:06 AM

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.

jasonjtrahan

10-02-2008 07:30 PM

0.35 but not any bigger.

extreme1

09-18-2009 12:50 AM

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.

svnt442

09-18-2009 03:34 AM

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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