I was dropping the tank in my '99 GT to replace the fuel pump and one of the plastic vent valves cracked. Does anyone have any idea where I can find a replacement or if it can be repaired?
Try searching car-part.com to get an idea what other model years will interchange as well as what salvage yards in your area have the part. Likely you will have to get the entire gas tank in order to get the needed parts. I suspect it won't be too expensive.