Welcome to PHP forum. As far a GTP38R, I haven't done a lot of looking, but just some preliminary looking for my brother and the best price(new) I've seen was at DieselSite.
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Thomas H.
'97 F-250 CCSB 7.3L Auto, Gauges, Modded H2E, 285/200% sticks, 7.3L IC, Stealth Dual HPOP, Pheonix chip
'03 F-250 CCSB 6.0L Auto, Gryphon CTS, FICM tuning by PHP, Powermax
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