If I am reading Arnie's post correctly. Firstly, he is only talking about the rears.
He is saying the problem is interchanging new top mounts on older struts and vice versa. Since the newer rear springs need to go with the newer rear topmounts as well, basically you cant mix and match the older(Ver7) and newer(Ver8) rear components at all.
As entire units(struts, springs, and topmounts together) there should be no probs swapping Ver7s to 8s and vice versa.