Jack, I am curious to know how you found enough 'meat' in the stock motor mounts to redrill holes 3/4" down from the originals.. Did you have to add additional metal plating?
I stopped out in my shop this morning before work, I have a '67 200/C4 sitting on the floor, the motor mounts are a simple stamped L shape.
I have another 200 frame/motor mount, that I thought was off a '67 or '68 it has a slightly different looking mount.
On this second mount you can see where Ford built in some 'adjustment' via a slotted bolt hole for the motor mount to bolt on/in to.
And because I mentioned them in my first post, these are the elusive '69 Mustang 250 frame/motor mounts. They are slightly different in that they use 3 bolts on the motor. Also in addition to the slot for the motor mount, they also have oval shaped bolt holes on the passengerside frame mount.
slotted bolt holes
And this last picture is the 200 frame/motor mount next to the 250 frame/motor mount, you can see that the 250 mount is more substantial and that the 200 mount is longer from the engine mount bolts out to the frame mount bolts.
FWIW, I have been collecting stuff because eventually I want to put a 250 in my '67, which has a slightly larger engine bay then y our '65