360 magnum into abody and efi/carby questions

The factory Mopar OBDII efi is very tunable. I'm running the same PCM that ran a near stock 5.9 Magnum that I am using on my 408" 480 hp Stroker with 39lbs injectors. The nice part about it is its plug and play.

Yes, you can buy or build your wiring harness, but mine hooked up with 4 wires. The fuel system needs upgrading either way, but the has been a lot of advances in that area in the last 5 years.

I use n SCT handheld tuner to upload tunes into the PCM. My tuner lives across the country from me. It took four tunes to dial it in. EFI is wonderful no matter how you get there.