Sounds to me that you are mixing parts with the 65 and early 66 mounts and the late 66 mounts. The later mounts don't have a stud, are the same for both sides and use ears on each end that match the holes on the frame portion with a through bolt holding them together. The frame mounting positions are equally distanced, fore and aft, left and right.
Don't try using any of the 67 specific motor mount parts because Ford experimented, in 67 only, with the dimensions on these mounts, (the mounts themselves and the frame portions). They are about 1/4" off at the mounting ears, the through bolt holes won't match up with any other years. This is confusing because the aftermarket doesn't recognize this difference and will list the 67 as being the same mount as the late 66 and 68 mounts. When trying to install the aftermarket mounts on the 67, you will play Hell trying to get the through bolts into the ears. I fought for hours prying and cussing until I found out about the difference. My remedy was to install the frame mounts from a 68 onto my 67. The 67 specific mounts (when you can find them) run about $100 each which makes the swap to the 68 frame portion obvious. As to why the change for only one year, no one seems to have an answer for me.
You shouldn't have any problems once you get the correct group of parts.
Don't try using any of the 67 specific motor mount parts because Ford experimented, in 67 only, with the dimensions on these mounts, (the mounts themselves and the frame portions). They are about 1/4" off at the mounting ears, the through bolt holes won't match up with any other years. This is confusing because the aftermarket doesn't recognize this difference and will list the 67 as being the same mount as the late 66 and 68 mounts. When trying to install the aftermarket mounts on the 67, you will play Hell trying to get the through bolts into the ears. I fought for hours prying and cussing until I found out about the difference. My remedy was to install the frame mounts from a 68 onto my 67. The 67 specific mounts (when you can find them) run about $100 each which makes the swap to the 68 frame portion obvious. As to why the change for only one year, no one seems to have an answer for me.
You shouldn't have any problems once you get the correct group of parts.