Safety First
I would not convert, but rather buy a new stove. The time, hassle and safety issues would make an entire new stove a better choice. A possible solution: my H260 has a Kenyon butane stove. There are similar models from Glomate (check West Marine and Boat US). Both brands use the same disposable butane canisters and would eliminate the plumbing you would need with an "installed" system. Alcohol has the advantage of simplicity and safety. If it leaks, the vapors diffuse into the air and leave the boat. Propane and butane are heavier than air and so could end up in the bilge if there is a leak, and turn the boat into a floating bomb. My Kenyon is built into a kind of tray with a hose that leads to a through-hull where the butane would go in the event of a leak. I say this not to discourage you from switching, but to emphasize that you need to ask a lot of questions and be sure that the installation is done correctly for safety's sake. Best of luck and Happy Sailing!Ralph C. RegarS/V Shambala