To my knowledge, Efi is the only one using megasquirt. There are a few swaps using stock engine management and a handful of carbed setups.
I highly recommend using the stock control system if you are not going for big power.
See my thread for a complete step-by-step:
http://forums.trailvoy.com/showthread.php?t=51636I also put together a wiring how-to that's floating around here somewhere.
Good luck.