Header rubbing on center link and idler arm

I did notice that the old mounts were pretty squished. I have new mounts ready to go on the block, and I installed new shocks just in case the old ones were contributing to any sag in the front end.

Do they make shims specifically for motor mounts, or is that something typically shop made?

Are yours the little square biscuit mounts? I forget the year of your car. If they are, you can just stack large diameter fender washers between the k member and mount. Shocks don't do any weight support whatsoever......unless they are load leveler types with the springs over them that go on the rear.