My moneys on a fuel delivery issue, The stock mechanical fuel pump probably can't keep up with the demand for fuel, especially with the smaller quadrajet fuel bowl. You may have to install an electric pusher pump back by the tank.
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62' Lemans, Nostalgia Super Stock, 541 CI, IA2 block, billet 4.5" crank, Ross, Wide port Edelbrocks, Gustram intake, 2 4150 style BLP carbs, 2.10 Turbo 400, 9" w/4:30 gears, 8.76 @153, 3100lbs
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