Between £1k and £1250 realistically, depending on spec.
It is absolutely worth every penny but is certainly not cheap.
Hey Sam how long did it take you to install all the megasquirt kit? Was very impressed with your vid on youtube..
I'm away to aquire a spare 3.9 that i'm going to rebuild and with the amount of wet holes I seem to find at SORC I think megasquirt is the way forward..
Niall