Check out GrandMarq.net. There are a lot of knowledgeable guys on there that can likely help you out. Since you ruled out the inertia switch and hear the pump run, have you tried cycling the key to off and back on a few times which would build up pressure and then try starting? Could be a clogged fuel filter, bad FPR, even a bad pump (what brand pump did you install?). Also check all the fuses that are related. Might just be a blown fuse. The Panther platform is usually reliable so likely it's not too big an issue. You may need to get a fuel pressure gauge on it to get accurate readings.
