97car Posted June 26, 2011 Report Share Posted June 26, 2011 SECTION X. CARBURETORS One 500 cfm holly 0-4412 5 point check legal carburetor. Venturi Bore Primary 1.373-1.377 Booster O.D. .620 (+or-) .010 Booster I.D. .380 (+or-) .003 Booster Height or Length .434 (+or-) .010 Throttle Bore 1.685-1.687 Throttle shaft & Plate thickness Pri .1868-.2008 These dimensions will be checked with a go-no-go gauge. Carburetors with injectors inside are illegal. No air leak device of any kind. Just a fyi, I found this on the ocrs website, they do run methonal though Link to comment Share on other sites More sharing options...
jwmbishop Posted June 27, 2011 Report Share Posted June 27, 2011 Just keep in mind five point check is not the same as box stock. Link to comment Share on other sites More sharing options...
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