Hi - that is possible, yes.
But, in the long run, that probably would work against you - you’d be stuck at RH6.12 and won’t be able to use Rhino 7, 8, …
So, yes, it’s possible - but perhaps you should work with us to try and fix what is wrong in SR 14?
Before I send my Rhino file to the Unreal engine in FBX format, everything was fine.
Today, I test Datasmith, Obj and all other formats, they always have a loss of information (usually with textures or coordinates)