Welded windlass channel (1950) vs screwed on channel (1949) front door opening, Red needles for 1949 gauges and white needles for 1950 gauges. Knee action shocks for 1947/49 and tube shocks for 1950 (except GMC) No side vent lever knob on 1950, just flat lever.
Isn't it white needles for a 49 and red ones for a 50?