differences...
B-trim streetable 8-10 psi average, hard to find now, not sold directly buy distributors anymore
A-trim 6 psi basic street low-level mod ($1900)
S-trim 8 psi base (pulley dependent) to 20+ psi streetable all the way to trackable depending upon pulley ($3000)
SQ-trim same as s-trim but with quieter gears ($3200)
T-trim 8 psi to the moon. According to MM & FF vs. the s-trim the t-trim performs best on a higher-reving race motor.
the s-trim is generally considered the best all-around vortech with good streetability and growth potential.
of course, opinions vary...
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1988 GT Convertible
331 10:1 TW heads, GT-40 intake, MSD, TRW flattops, B Cam w/ 1.7's, MAC exhaust, 24's, 70 TB, 76 MAF, 3.73's, Pro 5.0, Koni's, Anderson PMS, Wideband 02, yatta, yatta...
One week with new motor, two speeding tickets...joy
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