Switching nat. gas to propane with no conversion kit?

I want to convert a stove from nat. gas to propane. My stove is old though, the company that made it (Locke Stove) doesn't exist anymore, so I can't purchase a conversion kit from them. My question is can I connect the stove to a propane tank and use the tank's valve to decrease propane flow to minimum - to equal nat. gas flame - with no conversion kit. I've seen people singe chickens by using just a propane tank and a rubber hose.