Let me start out by saying I already own 4 sticks of 16 GB Crucial 2400 RAM, for a total of 64 GB. I guess it will either work in the Z370 FTW, or it won't (it currently works in a Gigabyte Z170 board).
However, the reason I'm asking here is that I'm trying to learn how to understand the listed memory specs. The specs list Crucial BLS8G4D24DFSA.16FAR, which I can't locate anywhere on the Crucial website. Googling it turns up results mostly but not exclusively relating to EVGA itself. Is it possible that RAM was discontinued some time ago by Crucial? Even if it were, it's surprising they don't refer to it on their website.
FWIW the crucial modules I have are BLS16G4D240FSB. If I can get the Z370 FTW working with 32 or 64 GB of it, I'll report back.