you will really need to watch temps and make sure you are not lean, you have to have temps in the 180-240F range all the time the enigne is running, you will have to wrap the head with alum foil to keep the enigne warm, and heat the before starting, if your enigne is running cold don't lean it to wram it up, just keep wraping the head.

and don't let the engine cool down to below 60F when its off.