I would also strongly endorse Mr. Hamlin as well for the job. I have done this several times on Fox, Baker and LC Smith guns. Any gun, without a dolls head extension is a much easier job. It does sound like you have a second set of barrels that may require a minimum amount of alteration to fit. That said, it may take hours to get right. Certainly not the job or gun to learn as you go. There are so few Lefever guns that the next set of "almost fitting barrels" may be years away. the small cost to have Mr. Hamlin do it right will be money very well spent.
