1A and 1C prefix?

[Kube]

What year / model does the prefix 1A apply to? How about 1C?

Thanks guys.

 

[deuce5wndw]

1A is 51 pass and 1C is 51 pickup.

 

[Kube]

1a is 51 pass and 1c is 51 pickup.

thank you!!!

 

[deuce5wndw]

Anytime Mike.