One issue that has crept into, well basically all vintage car stuff, is generic parts.
The engine mounts that are coming from India"?" now is basically one size fits all.
And the parts stores, online and brick and mortar are selling them as correct
for "your" car.
But the stud that mounts on the frame mount can be as much as 1" in the wrong spot.
It don't seem like much, but try and get that 1" to move and it's not going to happen.
Just something to keep in mined.