I am currently running H&R coilovers temporarily until I get all my parts sourced for my next suspension mods. However, my rear upper strut mounts need to be replaced. I have mode rear upper mounts that I would like to install. The question is what is needed for the spring perches on the H&R springs? They are not standard 60mm or 2.5". Currently have stock upper mounts with stock perches. Any input? This should be the same as the PSS setups for the most part pertaining to upper mounts.