Walnut Veneer Panels for XK-150. Bring the classic look of XK-120 and XK-140 DHC/FHC and sedans to your XK-150 with a burr walnut-veneered instrument panel or a complete dash. Veneered door cappings make for a complete package. Note: The early heater has a manually operated valve in the engine compartment. Late heaters have a cable-operated valve actuated by a knob located above the instruments labeled -- get this -- "Heater".