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Old 03-30-2012, 10:32 PM
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Formula8 Formula8 is offline
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Join Date: Feb 2004
Location: Chicago
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My guess is WFO 1 as the 70-76 units run a small square filter that fits up in the scoop while the 77+ units run a 14" round filter.

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71 Formula 433, Splayed cap 400 block, 4" stroke Scat forged crank, 6.8 Eagle rods, custom Autotec pistons. SD 295 KRE D ports, Old faithful hybrid roller, Torker II, Holley Sniper Stealth, Tribal Tubes, TKO 600, 3.73 Eaton posi.