Oh, and in your case you were at a bit of disadvantage since your engine came without any EFI stuff.
BUT... a used GM intake and TB is cheap.. as is a fuel rail. They you need a cheap Vette regulator/filter deal and some mods to a stock fuel tank. Lastly you need an OEM harness (again, from a scrap yard). You can mod it yourself with enough effort or pay $400 to have it done. They have the ECU flashed.
Done..
Or go with the cheap MEFI4 option like Turn Key offers.. 5 wires and you're golden. I bet I could put EFI on your long block for $1000... maybe $1,000.
But I have to admit... the carb deal looks very cool.