[PNJSNAK]

What engine are you using. I have a 351W and I am using the OEM replacement standard motor mounts you could get from Advance Auto or the others.
I just went to look at my engine mounts. On the driver side I have the mount supplied by A & C bolted right to the frame member. On the passenger side I have a 1/4" spacer between the motor mount and the frame member.
Hope this helps.
Jim