Eldon, good buy. I had my Ithaca Flues 20 ga chambers lengthened recently by a former Master Gunsmith for Ithaca by the name of Les Hovercamp. Les operates Diamond Gunsmithing out of Ithaca, NY and he specializes in servicing old Ithaca doubles as well as model 37's. His work is excellent and his prices are very reasonable should you wish to have work done on your Flues. Contact info is:
www.diamondgunsmithing.com 607-273-4510. Address is: 211 Dey St. Ithaca, N.Y. Les is good to deal with.