The use of the 1G parts would be great in terms of cheapness, but this has been done before lots of times (MPi, not 1G stuff).
http://www.fuelinjectionpro.com/
Those are the main guys, the people who actually setup an entire kit. For about 2k you get everything you need to go MPI. Before this company, people were (and still are) gathering parts and making it themselves. Magna manifold, standalone fuel control, etc etc. Most people seem to be drawn to the 'all-in-one kit' compared to the 'find seperate parts yourself' thing.
FuelInjectionPro also has a megasquirt system, which simply tosses in some more injectors with a fuel control I believe. If going to FULL MPI, the consensus seems to be get an MPI manifold, not toss in more injectors. But to each their own eh?