Buy what in parts? All I need is the supercharger, no injectors/tb none of that
It seems you still do not understand some of the changes that were made on the D170 3.0L compared to the Hellephant 3.0L even though I have mentioned them on here a couple of times.
You say you don't need the injectors, that's a valid statement. However you also said you don't need the T.B. That presents a problem with your choice for the D170 3.0L as when they made the snout larger on the D170 3.0L compared to the H 3.0L, since they also made it with a five bolt attachment face for the new OEM 105mm T.B. instead of only four bolts. It will not accept the standard four bolt T.B.'s that everyone makes for us right now unless you had a custom adapter plate made for it.
So really you would be better off to get it with the OEM T.B. Plus, you also want the flex fuel sensor so you would need the fuel rails as well even though you would need to do some programing and maybe other changes to make it work properly like it does on the D170.
What I would do in your case is just buy the Hellephant 3.0L instead and then add the stuff you want to it or wait until the D170 3.0L shows up in Direct Connection catalog, and buy it then, because I have a feeling that it will be much cheaper at that point then what it is pricing out at the dealer right now.
You can always sell the injectors if you don't need them. Hopefully they didn't change anything drastic on the injectors with their design which I have no info on yet besides them being able to supply 165 gph.