Will later year motor mounts fit the early mustangs. For example, would say a 93GT motor mount fit my 70, or are mounts year specific. Reason I ask is, I read a mustang page on the net where the person suggests putting in 93GT MM into early mustangs due to them being "heavier duty".
Try the new motor mounts from http://www.totalcontrolproducts.com. I just put a set on my 70 Mach 1 three weeks ago and they are awesome and fit perfect. There is extra clearance for headers and are quite heavy duty. I also don't have the problem of my motor moving arount and banging my custom header on the shock towers.