I've done a Magnum fi swap into a classic 50s Mopar, and I've helped with a 5.7 swap in a 50s Mopar. My 39 Dodge truck has an efi 5.9 Magnum, and the 49 Dodge truck sitting her will get a 5.2 Magnum efi swap next summer. I really like the stand along EFI harness at www.hotwireauto.com, not cheap, but it flat out plugs in, hook up 4 wires to the truck's harness, and runs.

Its been done a lot of times. Not usually a cheap deal, buy worth every penny as far as I'm concerned.

Why not ask on the Gen III Hemi forum here? They can probably provide you with the latest info. Gene