Before Before you get all hyped up on DIY, might take a look at this new FAST item
http://www.fuelairspark.com/WhatsNew/Files/fastez-efiselftuningfuelinjectionsystemwith4150throttlebody.pdf
From what I read, the expected street price will be in the $1900 range. That's cheap for full on EFI.
1967 Falcon 4 door 351C-4V
1970 Mustang 351C-2V
http://raceabilene.com/kelly/hotrod
Owner built, owner abused.