I would like to get the newer model '06 and up motor. It seems counter productive to start with the earlier model.

The HPtuners and EFIlive sound pretty good as far as being user freindly, and it would be the easiest route to have the VVT working. Is this similar to megasquirt as far as tuneability? What would be the downside to this route (if there is one)?

EFI, you say that the Megasquirt 2 would be the one to start with. Would I be able to control VVT? You deleted the VVT on your engine correct? Did this hurt MPG or power? Like Limequat said... How does the mileage compare between a 292 and a 4200? And the ultimate question... If you did it over again, would you still go with Megasquirt? I appreciate all the good feedback!