Fire N The Hole !

dgibby said

i used Autolite 3924 in my small block and think they are listed for big block also.

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about the same build as mine. ngk 7 so far, in mine. not running mixed gas, just 91 oct. real gas. plugs look a hair rich, but about the right heat range. can lean it down w/ the f.i. tho. what gears u running ?