There are ones that replace holley carbs. Here's one:
https://fitechefi.com/product/30061-go-efi-2x4-625hp-system/
Just do a little Google research. As for fuel systems there's a few ways to go about it. Most systems return excess fuel to the gas tank or to a remote reservoir. You can buy a new gas tank that is already set up with a new high pressure fuel pump and a fitting for fuel return. You can also get a remote fuel system such as this one which makes everything super easy if you have a place to mount it:
https://www.jegs.com/i/FITech-Fuel-Injection/546/50004/10002/-1
Roy
https://fitechefi.com/product/30061-go-efi-2x4-625hp-system/
Just do a little Google research. As for fuel systems there's a few ways to go about it. Most systems return excess fuel to the gas tank or to a remote reservoir. You can buy a new gas tank that is already set up with a new high pressure fuel pump and a fitting for fuel return. You can also get a remote fuel system such as this one which makes everything super easy if you have a place to mount it:
https://www.jegs.com/i/FITech-Fuel-Injection/546/50004/10002/-1
Roy