If there are any parts that are interchangeable between the VFR/RVF and the VF, I'm looking to make some subtle mods to my VF and wondered if anyone had any thoughts or experience on this?

Not likely.

What parts are you thinking of changing?

I was thinking of changing over the front forks and wheels mainly, but had also given some thought to maybe some engine parts and ancillaries, and was wondering if anyone had done it before and had any advice before I look into it any further.