There are several members here that can assist answering your questions, Blue Avenger and N Cal Mike and Andrew (?}, probably more who have made a conversion or "built" pistol frames.

I am not one to show a how-to because after trying it, I won't bother doing it again. You might also try Specialty Pistols forum , there are some members of this forum there as well. Tinkerer over there is a good source for stocks, that is where I sold the project I mentioned. Andrew in OR a member that has some youtube vids of large caliber, https://www.youtube.com/watch?v=nH-984iPdqw is worth a watch.

I do know from trials of cutting down a pistol grip rifle stock, it is not difficult, but my effort was an ugly pos. I'll order an undesignated action from the custom shop before I screw around with another "project pistol," or buy a new/improved 110 factory pistol frame. Here is a question, the new 110 pistol, is it a long or short left/right action?

Btw, my FFL ordered me an a VLP from the custom shop today.