Fact or Myth? LS Efi swapped onto 5.9/5.2 engines

I’d be more interested in a way to adapt an LS or Gen3 intake to a magnum than the injection management
The reason I'm asking is only cause of the amount of after market support the LS has when is comes to EFI. Coil on plug, Fly by wire options, endless boost options, ect **** even FItech (not saying I would buy from them just saying) has a flybywire full harness, programmable ecu with software 'supports boost", everything you need to get it running for $795.
There are some many options that the prices are low. It would just be nice to be able to tap into that affordable support.