Mostly I just had to remove wood from the back of the buttstock untill it fit into the inlet and also it needed the top inlet lowered a bit it was pretty easy compared to starting from scratch, I stainned the stock with LMF Walnut stain very dark after raising
the grain three times, then took the stain down to my likeing with steel wool, then I put on a thick coat of linseed oil, turp, spar varnish and roof tar (asphaultum) and after it dried, sanded it down with 600 grit this somewhat filled the pores and gave it a oldie, used, dirty look in places. then I finished it off with BC true oil wooled down betwwen coats with fine steel wool,( a mix of lin oil, turp, and spar varn would work as well but I was out so I used up an old bottle of BC that was on the shelf) then burnished it down with a smooth deer antler, followed by a very light coat of stock wax hand rubbed till dry and buffed down with the suede side of a piece of deer hide. I was looking for a bit of an aged look and something diferent than the fancy high grade finishes most use today. I have done several guns this way or close to it I vary things a bit from time to time according to what I have on hand and what strikes me as a thing I want to try.