Need big block help
Looks like a 440 with EZ heads and an Indy dual plane intake. It should pull past 5000 RPM even with that cam. That cam is 230/236 so it is small for 500 inches, but it should still pull to 6000 or so. Maybe the EFI system isn't working right, or maybe the ignition wasn't up to snuff.
FI tech stuff can be really flaky. I've stopped using it and switched all customers over to Holley Sniper or Terminator X.