Efi source ms3x $1299
Innovate mtx-l wideband $150
6 wire hookup, comes preloaded with a start up time. It's the easiest way to run a modern Hemi.
You still need a fuel system with a high pressure pump, but most people can run what they have. 3/8 line will supply what most are doing with these builds. I've got less than $250 In my fuel system, but I already had 1/2" stainless feed and return lines from my carbed days. I bought them really cheap on sale from a fine lines Xmas sale.