I just bought a 1972 Vermont Castings wood stove called a Vigilant. It is a big empty cast iron box with an eight inch flue and solid no-glass double doors. What do I need to do to it to enable secondary combustion or gasification?
Sounds like you have a real classic and built to last. Unless you are required in your area to add this, I would not waste my time on this stove. If you decide to do anything, the easiest will be one of the kits that fit into the flue on top of the stove.