150 speedometer for 150 speedometer

I just realized I have the wrong year speedometer for my 68 barracuda after searching some
threads. Apparently the 68s are supposed to have the numbers oriented in a circular pattern rather than vertical as the one I have now.
I don't know what year this speedometer is but must be 69 up from what I've read. It does have the trip option and is in good shape.
If anyone has the one I need in comparable condition I would be interested in a swap.
Also if anyone knows if the diecast frame is different on the 68 if it came with factory air or not I have been searching threads trying to find this info. Thanks.