Two words (okay, it's more than two): Lentech and/or Baumann Engineering. That with gears and a higher stall converter, and you'll love it as much as I like mine.
You'll get more help with this in the
Windsor Power Forum, where I'm transferring this topic.
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Capri306, Moderator, The Mustang Works Online
1979 Mercury Capri, 5.0L -- C4 -- 2.73
1987 Mustang LX Notch