Lets condince this to one thread so i am not answering the questions twice....
PIMPXS is what you want, with a spartan2 WB.. you can add a gauge to it if you truly must.. or if you want the most out of your experience you can just drop in one of the dashes designed and built by a member on this forum created just for the megasquirt based cars.
Introducing the Digital Dash EFI Plug-N-Play Digital Dash with Internal GPS for The Megasquirt Community. Simply plug in your ECU Tuning Cable, and have a FULLY user customizable digital dash that runs the Full Version of TunerStudio MS. NO tuning laptop needed sitting in the passenger seat anymore!
dd-efi.com
with this you can literally design the instrument cluster in anyway you like, it is literally a pc installed in the car full time... meaning you can do all the tuning with this and never once open a laptop.