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Old July 25th, 2016, 06:54 AM
bigblockv6 bigblockv6 is offline
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Default Re: 1964 GMC "crustine" semi-build.

If you want to go to .060 gap, that's something I just did recently on the plugs then get some HEI spec plugs. I found AC R44XLS6 PLUGS have the correct 3/4 reach and are within the heat range. These plugs are actually for a 90's GM 4 cylinder application

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