FireFighterZero
Captain Zero!
Might be a good idea to get a three key set, maybe the parts store would swap you. I checked the internet and they are available for under one hundred bucks. I looked into propane and it sounds like it likes a lot of advance. If you put your new set on, you may not be able to twist the distributor enough to get it to run right, and the vacuum advance may not be able to compensate for daily driving. I gather propane likes a lot of advance because it is slow burning and needs to be ignited sooner.