Are the frame to engine mounts interchnagebale bewteen cars?
Would the frame mounts from a cougar fit a mustang of the same year, say 69?

I am swapping a 302 or 351w into a mustang that currrently has a I6 motor.
The car is a 65.
I see that you can purchase motor mounts all day but I never see the frame to motor mounts for sale. So I saw some on ebay and would like to know would they work. The ones from ebay are froma 69 cougar.

Thanks