Wanting a part number and a vendor, for motor mounts that will allow me to bolt a 5.0. 1968 engine, to a 66 mustang convertible?

 

There are two things that come to mind. One is, you've transposed 1986, in which case, I don't know. If you truly have a '68 engine, the motor mounts for a '66 will do the job. The other thing would be, that you left out that the '66 vert was a 6 cylinder.