Current NHRA Record Holders: Stock Class.
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9-inch tire, stock lift cam, stock cfm carb, factory-style intake manifold, original head castings with no porting allowed, factory rocker arms, factory OEM block, factory crank w/stock throw, .070" overbore permitted, factory compression ratio. Full interior at rated shipping weight, typically 3400 to 3575 pounds. No power adders, factory hoods.
A/S (the fastest Stocker in the world, 427 MR), D/S, F/S, B/SA, C/S.
Current NHRA Record Holders: Super Stock Class.
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14-inch tire, rear tubs, wheelie bars, any lift solid roller cam (usually .750 to .775 for an FE), stock cfm carb, factory-style intake manifold, original head castings with porting allowed, any rockers and cam drive, factory OEM block, factory crank w/stock throw, .070" overbore permitted, factory compression ratio, interior, weight. No power adders, factory hoods.
SS/F, SS/G (LeBlanc shifts his Cobra Jet at 8300 rpm), SS/GA. I do believe that Shaun LeBlanc's GT/A Saleen is Cobra Jet-powered, also. (GT class is newer body with older engine).
For you small motor fans, observe SS/L and SS/LA, where most of the early 289 cars run. Years ago, before they allowed head porting, those cars were running low 11's with 10,000 rpm shift points under a 480 cfm Autolite carb. God only knows what they shift at now.
Carbs Rule!!!
CobraJet