I'd go with the blown 4.6L DOHC. Last summer at Bowling Green, Kentucky, I saw what one can do with 28 lbs. of boost hooked to it. WOW!
Poor guy blew it up at the 1000' mark, I believe, but not before making quite a few passes. Hey Dan, what team was that, anyway?
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Capri306, Moderator, The Mustang Works Online
1979 Mercury Capri, 5.0L -- C4 -- 2.73
1987 Mustang LX Notch 