To remove the old jets, use the jet wrench that comes with the conversion kit (or a socket on an extension bar). Then install the proper jets for your grill model. Remove the valve knob by pulling it ...

A friend has offered his 48" Jenn Air range to us for a really nice price, but it's setup for propane and not natural gas. I'd call and ask JennAir if the conversion is possible (read fairly easy), ...