engine harness for $$$

great info.....anyone use anything above and recommend?

pros / cons helpful
My experience falls far short of your Whipplecharged 6.4, I've only done a couple fairly stock 5.7s.
First was a modded stock harness and reflashed factory '04 ECM, other was 5.7 with a HotWire kit.
Hotwire's been at this for years, their stuff is pretty much seamless. Based on OEM.
Swap Specialties' stuff intrigues me, but have not used it.
DIYHemi is a wealth of information for various work-arounds and persnickety stuff.
I would think the user-tunability of the Holley setup (versus custom flashes in the OEM stuff) would be a major bonus for your setup, which is way beyond my Gen III experience.