How are the mounts different? B/C on my car I’ll be running S14 front spindles, so would that make S14 coilovers fit perfect, or is there a difference in the upper mounts as well? Are the rears the same? I know I can just buy S13 coils and run collars on the bolts to get them to fit, but I don’t think it’s as safe/wise, plus, I’m 90% sure I’ll sell my car next year and buy an S14 anyway, and I’d love to be able to transfer over all my mods.
By your description, it seems that the S14 fronts will fit perfectly on your S13. The only difference between them is the size of the bolt holes on the lower mount. Did you have to drill out the holes on your current strut?
The rears however will not fit, as the S14s struts are significantly longer.