Cool, I saw Byonics has cables pre-made too for $19. Can you use APRS and Packet Radio simultaneously? I think I would just get their GPS2 module. I saw they have a BlueTooth module, but the GPS on my phone kinda sucks.
TT4 w/ GPS $140 + Display $45 + USB Cable $20 + Interface Cable $19 - $224
84 FJ60 The TuRDle
& '89 Pickup Ext Cab DLX 22RE/5spd