Are all KYB gas-a-just shocks the same?

[furious70]

So I bought a set of 4 for my 68 Charger off ebay, but they sent me the wrong rear shocks:

KG5466 were sent, which is for midsize 4x4 vs

KG5512

dimensionally they are close, but not the same, but is the valving also going to be different or are they all just the same inside? The ebay retailer says 'they are all the same', but that's just a random seller on ebay of course.

 

[furious70]

KG5466
Extended Length 22.95
Compressed Length 14.09
Stroke Length 8.86

KG5512
Extended Length 22.64
Compressed Length 13.98
Stroke Length 8.66

but I don't see any info about valving or vehicle weight assumptions

 

[furious70]

moot point as ebay arbitration sided with me and gave me my refund. I did additionally find through a link another guy posted that the mount points are different too.