1999 Magnum & 46re trans

Hello
I require some direction on where I can get a wiring harness or modify mine to run a 1999 5.9 r/t engine and 46re transmission in my 1929 Essex street strip rod. do You know of any one who builds these harnesses,
I am willing if i have too is to convert this to a carb engine if i have too,

any sugestions on a good cam , and do i need a different intake manifold than the one i had on my 76 360 engine.

any suggestions or direction would be greatly appreached

Harry Svingen

car weight 3200 lb and used to tun low 13 sec
Author: Svingen