I USED THE ORIGINAL IN THE 68 I HAD, IT WORKED GREAT. IF IT IS STILL WORKING, THERE IS LITTLE CHANCE IT WILL QUITE ANY TIME SOON. THERE SHOULD BE A [PLACE TO ADD A HEATER TO MAKE IT RUN ON 120VAC.I HAD A NEW ONE LAST LESS THAN A YEAR AND HAD TO REPLACE ON WARRANTEE. MikeFromMaine Airstream, Truck and hitch