A .450 is slow on a sportsman tree, no offense.
Sounds like you shifted at about the right rpm. To give you an idea a well driven stock 99-04 stock Gt can run 13.80's to low 14's. You need to go back and run some more, get as many passes in as you can. There is no substitute for practice.
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True Blue 2002 GT Premium 4r70W
1/8 8.205@ 84.780
1/4 12.874@ 107.20
Bolt on's n/a
NMRA #7703
Dyno'd at Modular Depot 251 hp. 291 Tq.
4.30's, 3500 Stall converter, Steeda upper & Lowers, Tokico drag struts, M & M frame connectors, P & A valve body, C&L plenum, Accufab 75mm TB, Jet Hot Long tubes, Hooker O/R X, Steeda catback,SCT tune,Steeda pullies.
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