400hp magnum on DPI

First off sorry to the mods if I posted this in the wrong section.

So I have done a lot of research into engines lately but didn't come across a build looking to get the power I am seeking on port injection, the original game plan was to put a 400hp LA 360 in the 360 dart and later down the road upgrade to the Edelbrock DPI manifold and EFI setup.

The other day my buddy brought up the fact that if I want port injection I should consider a magnum swap because there was already a motor designed with that in mind instead of paying through the @$$ for one manifold. I have no issues going this route (just eventually sell the LA in the dodge) it makes more since especially with all of the advantages of the magnum motor roller lifters, rockers, higher comp pistons, and a new set of eddy heads (was going to do anyway).

So down to the meat and potatoes of this I will be running a manual in the car and want to achieve a 400-450hp mark on port injection. What all boxes and harness do I need to save from the donor vehicle? Or will the stock units not be able to handle the cam profile and other things I will be putting into the engine and I should consider aftermarket ECU like mega-squirt?
Author: admin