I have a VC Defiant 1910 that I saved from a remodel in southern Georgia. I don't think it has been used much but I have no history of it.. The vents and damper look like they are working. The gaskets seem good. The catalyst looks fine and catalyst box is intact with all the parts in place. But before I put it in my pickup and drive it to Wisconsin to give to a friend is there a way to insure it will work? I hate to drive it 1000 miles north, install it in his house and then find out next fall it does not work. Any ideas?