I have not, but I suspect it will look a bit odd.
This is what I suspect is actually a 1/56 scale twin 23mm cannon on a 1/48 scale light APC (Empress Zsu23-2 and HLBSCo BMD).
It does look extremely weedy.
Your 75mm gun would work out at about 66mm.
1/50 scale Empress jeep and 1/56 scale Warlord and Rubicon jeeps.
William Killian on a 25mm base for scale.
I hope you find this useful.