Found this (new) BBC EFI kit locally, it's a Edelbrock 3562 EFI conversion kit. Includes intake, fuel rail, 19lb injectors and wiring. They sell for $1100 plus.
I was thinking about it for my extra 454 motor...but it's really setup for someone with a 454 with TBI...it would convert from TBI injection to -8- port injectors. I suspect you would use the stock 50mm 454 throttle body for air flow, install a larger fuel pump and use your O2, MAP sensor, your ECM etc It's a speed density setup.
http://plattsburgh.craigslist.org/pts/4390657518.html