47-55 1st series Chevrolet Accessory Truck Heaters,
How many different Heaters did GM sell?
I thought there was only two types:
Recirculating (top heater in example)
Air flow/fresh air (bottom heater in example)
Examples The reason I ask is
THIS 1951 trk HEATER part #986554
Does not look like the above recirculating type.
It looks like it is more of a square box rather than round.
Master parts catalog
Grp # 8.845 does not show that part number.
