Try removing the Objects folder in the Mod.
That will leave the original 7B turm in place.
I don't recall what I did but give that a try.
Now I've run that download in GWX today and I don't get that texture problem.
Not sure what's going on but it does show it in S3D.
As always? All my Mods are based on GWX 3 from The Grey Wolves.
Should they not work in other Mods? NMFP.