65 Barracuda, 225 vs 170 motor mounts.

I've encountered a problem with motor mounts, on my 65 Barracuda restoration. My fender tag and broadcast sheet indicates that my engine is a 225. (20) I ordered the left and right motor mounts based on that information. A2265 (left) and A2264 (right). When they arrived it was obvious the were not like the ones that are in the car now...A2303 (left) and A2304 (right), these are being shown to be for the 170. I haven't checked the engine serial number...didn't give it a thought to see if it had been changed out. Am I dealing with an engine swap, or a parts problem?
Norm