Pretty much - I am going from a factory PCM on my 6.1L to a complete stand-alone system and have been accumulating parts as I go. The Holley is a good system but honestly, I prefer to make things work not just buy plug and play stuff... I built a MS3X and am currently making the wiring harness - the MS3 is just as versatile and nothing on it is proprietary - I can troubleshoot it myself, expand it, modify it, etc.
I am glas that companies are coming out with gen 3 swap parts - makes things a lot easier than when I did my swap 10 years ago - but when there's so many "bolt on" things swaps become underwhelming IMO - look at LS swaps... I just walk past most these days because it's simply but a crate engine, plug it in, and go... no real "hot rodding" going on these days.
