Well if its 215 stock, you might be running 223 now.
Best bet would be the UPR timing adjuster, the steeda unit won't work with the mac pullies.
Get some gears out back. It will use the hp you have better.
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1997 Mustang GT "The Freak" - 13.80 @ 101.70, 2.07 60'
1995 Honda VFR750 - not much @ really fast (actual data pending.)
1964.5 Mustang 289
Rice Haters Club Member #13
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