Here's another image of the 342nd:
https://www.kansasmemory.org/item/225688/page/1
With names:
https://www.kansasmemory.org/item/225688
I'd say there is a good chance some of those faces look similar. You really need input from the true ear experts though. Some calves could be examined as well. Grover had rather slender calves compared to his peers.
All joking aside, the above links might provide you with some of the best comparisons in regards to time period and age.