Nick can answer for sure, but I can’t see why it wouldn’t be. Pretty much any body harness would work.
You need to lay out the chassis harness, lay out the engine harness, see how they would best be tied into each other, and work the spaghetti factory into a piece of fine art!

Any common EFI conversion/swap into an old vehicle is typically using a stand-alone engine control harness and computer.
This means all that the body/chassis harness has to provide are:
1. switched power (usually 12V in the ON and START positions only)
2. constant power (usually added by the installer)
3. copious grounds (also mostly supplied by the installer)
4. A START only signal maybe?
Sometimes a tach signal for the computer, but that’s typically in the engine harness, I believe.
Final tally would come from the engine harness builder.
If you’re using a harness from EFIGuy, Garry would be able to provide the full picture.
My 68 has a full Explorer swap deftly handled by the old plain Jane Centech harness. This new harness should handle all those duties and more.
Maybe 904Bronco can chime in with his experiences using Centech and Explorer harnesses to give an idea of any special needs that might crop up.