GFORCE CHIP
If you're still looking for a performance increase, below is a list of reputable AND EXPERIENCED F150/250 gasser tuners. Some might not be able to support the 97 (OBDI).
I recommend you consider one of these with custom tunes:
Programming Devices>>Company Info Links
SCT>>5 Star Tuning | Custom Dynomemeter Chassis Tuning Products and Services (forum sponsor)
SCT>>VMP Tuning Inc
Gryphon/SCT>>Power Hungry Performance - Feed your hunger for POWER!
SCT>>Troyer Performance (very long lead times)




