I can't see entire HIN .. But says 1974 model.
GCV026390674
Some of the other 1974 HIN I have say "- Model1975" at end of number and don't have the month letter ..
1973 was old style deck design and blue/white was a 1975 color.
GCV01014M74A 1974 CV16 GR
GCVO1172M74A 1974 CV16SS BL
GCV01762M74C 1974 CV16SS. GR
GCV01818M74C 1974 CV19 A
GCV01847M74D 1974 CV21. GL
GCV01896M74D 1974 CV16 GR
GCV02070M74F 1974 CV16 GR
GCV02358M74H 1974 CV-18
GCV02379M74H 1974 CV16 GR
GCV02489M74I 1974 CV16
GCVO2552M74J 1974 CV21 GL
GCV026560674 -1975MODEL 1975 CV21
GCV026680674-1975MODEL 1975 CV19SS
GCV03087M75A 1975 CV16 P
GCV03283M75 1975 CV16V8.P
GCV03325M75C 1975 CV16SS BR
GCV03496M75D 1975 CV16SS BR