I'll be running a stock ECU and Harness from a 98 Ram 5.9. The Harness was modified by MagnumMopar, and the ECU is tuned by a guy named Flyin Ryan Performance
the Throttle body is 90mm GM unit with GM TPS, Neon SRT4 -2bar Map sensor, 60lbs (short) high impedance injectors, walbro 255lph in-tank fuel pump, and a corvette fuel fliter/regulator....
The SRT4 Map sensor will go in place of the stock Ram map sensor. Although it won't be on be located on the Throttle body like the ram it will be mounted to the manifold reading the vac/boost from beneath the SC.
This guy Ryan is a freaking wizard with tuning these damn mopar efi's. If this is the route you plan to take I suggest joining his face book group and reading his web page and get a hold of him tell him your intentions and he'll Help you with pretty much everything.