im on board with don on this one. i tried even street tuning my car myself without a wide band($300 for a decent handheld MORE for a guaged in car) and other proper tools and almost destroyed my engine wen it went 21:1 AFR at WOT. my car after don was done made almost 100 more rwhp then my "tune". i read every book researched for WEEKS and still got no were. dyno rental yes you will have use of wideband in house. can you take it with you and make sure your street/driveability is were its at? cuz unless its a Race only car and you will never street drive it a Dyno only WOT tune is useless in my book.
But its your car and after your done waisting tons of money on rentals and tools. call Don and he'll fix your mess. HOPEFULLY
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1998 Firebird:buncha parts thats used to make it go fast..... not so much anymore. 
BAAAAAA!!!!!!
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