Okay, quick summary of the differences between 3kGT and GVR4 F suspension fitment, correcting some of the errors in my earlier statements and clarifying other questions:
 [*]3kGT hub mounts are 3.5mm wider [25.5 vs. 22mm]
 [*]3kGT OEM shock overall length is ~= TEL @ 480mm, ~20mm shorter than GVR4
 [*]3kGT top plate mounting bolt pattern is much wider
 [*]3kGT / TEL Tein camber plate alignment is rotated ~90deg to mounting bolts
 [*]3kGT, TEL, GVR4 Tein camber plates interchange [mount spacing issues still apply] 
 [*]Tein uses 12.5mm F / 22mm R piston rods for most applications [
here]
 [*]Tein 3kGT camber plate is flat like GVR4
 [*]Tein TEL camber plate is recessed [overall taller] than GVR4
 [*]Tein will not sell just the top plate - only the complete pillowball assembly.
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I think that is enough. If SPAM has plates I can use, I'll go that way. Otherwise I'm going to look into purchasing a set of Tein pillowballs if the price is reasonable.