The new Chevy of the 40's truck catalog has a picture of my heater in its new catalog on page 112. All I did with my heater is replace the guts with a 12 volt motor. I purchased the new decal from Chevy's of the 40's and had it painted with a hammer head brown paint. I don't have the catalog with me, but I think it shows the entire heater with the control arm that switches from cab heat to defrost.
Bolter #11925.