Gen 3 Hemi list input needed

IMO, if the wiring scares you, I'd recommend you use the factory harness and ECU. Sublime Technologies can make a factory harness plug and play.

I've read too many stories of people blaming Holley only to later find out the source of their problems was their poor wiring. Not to mention, its easy to get discouraged if you don't completely understand how things work and problems arise. The swap is mechanically a pain in the a$$ alone, don't make it harder on yourself.