Nexus 3k vPC Redundancy Help

What I've got today:

I am coming from a pair of 5548s with a bunch of 2K FEXs as my ToR. The FEXs are currently multihomed to each 5k, and I add a server into each of the 2 FEXs at the top of a rack and create a vPC for redundancy. vPCs are extremely self-explanatory with that gear.

Proposed diagram: https://i.imgur.com/S0BPWM4.png

So... it's almost 2019 and it's beyond time for a 40gb core and 10gb ToR. New switches here I come.

I know I can do a vPC from the server to each 3172. What I am unsure of, is can (should) I do a vPC from a 3172 to each 3132 in the core? I would like to avoid layer 3 between core and ToR, since my VLANs are spread amongst many racks.

Thanks.