If you could afford the 99, get the 99. I was faced with this same choice and I'm glad I bought the 99. There are alot of differences besides peak power. The brakes are better, stronger engine block(Windsor vs Romeo), internals, better flowing heads & more.
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99 Silver GT
4R70W, Borla Cat Back,
SHM Slotted Rotors, custom 10.5" ProTorque 2600 stall converter, Transgo Shift kit, Redline Synthetic ATF, Cooler, Bassani X-Pipe, Vortech V2 S-trim, 3.73 gears, 70 mm T/B, Mac Adj. uppers & lowers, ROH ZR6 17X9.5 & 17X8.5 with Nittos, BBK(Walbro) 255 pump & FMS Shorty Headers, D&D Tubular K-member, Coil-overs, & A-arms. Currently running 3.33 pulley at 10 psi(lowered shift points), but not dynoed yet.
Dyno:
316 rwhp
332 rwtq
Dyno 3/26/00 After fuel mod, FMS headers & Pro Torque Converter.(RUN #6)
338 rwhp
342 rwtq
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