Cleaning the shop area last night found a 9/16" UHMW spacer that I ran on the Gutsram intake. Due to height limits in a stock chassis/hoodline car I used a flat aluminum top for the AFB's. The spacer went between the intake and top for more plenum volume. With the spacer I picked up almost a tenth.
I have also found with both intakes a Shear Plate under the carbs is worth about a tenth,
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65 GTO, Tiger Gold, Nostalgia Super Stock 421, 2-Carter AFB carbs, Stock Suspension, 3550lbs Full Exhaust-- 9.70's@135
66 GTO (Retired race car)
421 CID
Multiple NSCA/NMCA World Champion
66 GTO 389 3x2, 4 speed, 3.90 gear, Montero Red 33K original Miles
67 GTO 2dr Post, 428, Tri Power, 3.55 Gears
80 Trans Am Black SE Y84 W72 WS6
Last edited by Mike Davis; 03-06-2022 at 11:14 AM.
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