If your track preps decent, then I'd look into a radial.
I haven't seen a car that didn't go faster w/ a stiff sidewall slick compared to a standard sidewall. Granted, every time I've seen this done it was on a car faster than a 1.4 sixty foot.
It was my understanding from years ago that a "W" tire had the same stiff sidewall...in a M/T anyway.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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