Here is an option for fuel injection for a big block.
https://www.eficonnection.com/eficonnection/58xBBC.aspx
It basically deveops a 58x signal for use with an LS style system ran by a FAST, Holley controller system. A buddy was considering it for one of his before he decided to go LS. I came to the same conclusion if I decide to swap the 454 in my truck.
Sounds like serious plans and parts. Have fun!