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hey guys , just put a set of edelbrock easy street heads on my 77 400 , any sugestions on whats the best sparkplugs I should use ? thanks

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Edlbrock or Indy EZ Street heads? Probally the same plugs will work, I would try either the Autolite # 3924 or the AR3911. I have ran both of those plugs in a low compression pump gas street motor with Eddy RPM and also in the Indy M.W.intake port SR heads I replaced the Eddy RPM heads with