Hi, Bob.
I went the EFI route this winter as well- although a different route than you did. I went with a complete FAST setup; ECU, harness, XIM- box, Ls1coils, injectors, inlet manifold, TB and all sensors - even got some extra sensors for logging & harness for the fuel pump & fans- and the bill ended up at alot more than I had hoped for. Well, I even got the Explorer '00 front cover, balancer & sensors.
I feel a little stupid by spending all that money, but I know the harness is all plug and play. I know I could have gone the MS route, but I did not have the guts.... There is so much else I wish to spend my time on, so I have avoided making the harness & connections.
What I have to do, though is a little bit of work on the damper/ trigger wheel & pulley. Even have to make a new bracket for a new alternator. I'll have to make some alterations to the cooling system connection on the front cover too.
I have been looking some at the MS forum at the Corral; I'm sure you'll find some useful hints & tips over there.
MegaSquirt - Ford Mustang Forums : Corral.net Mustang Forum
Will watch your thread this winter!
Happy holidays
RuneS.