the 4.6 is a modular motor, some are simpler than others. Mine being from a p71 is wired in both the engine harness... and the body harness along with the dash cluster. I am not saying that I can't do it.... but at the end of the day I think I would be happier with an IDI.... the 4.6 puts me in the "lightning" crowd.... somewhere that I do not want to be. An IDI swap would be very simple (especially because I am working with an open frame) and a year down the road the IDI would most likely still be running, whereas the 4.6 might be eating coil packs and shooting sparkplugs out of the heads. Input work vs. Output reward is what I am after.