Just my opinion, but I don't think there's a snowball's chance in hell that a car can pass with the X303 camshaft. The overlap is gonna drive the HC levels up so far it won't be funny...especially with that speed density pooter. No way. Mass Air would have a better chance, but if it's a chassis dyno test, F-no.
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Capri306, Moderator, The Mustang Works Online
1979 Mercury Capri, 5.0L -- C4 -- 2.73
1987 Mustang LX Notch