The wheel sizes listed are basically what bpd runs in his setup. Being deep dish wheels though, for a RWD setup, makes me pause. Too much backspacing required, I'd think?
EDIT: CarID Configurator says RS-8's would fit, so the RS-10's should also. I see a pic of the SHO with the RS-10's on it on the configurator.
Brand:
Concept One WheelsStyle: RS - 10
Finish: Silver with Machine Cut Face
Specs: C74820853855CSF-A: 20x8 5x114.3 ET: 38
Description:
20x8.5
20x10
22x9
22x10.5
EDIT2: Yes, they should fit, according to CarID on their website when selecting 2013 MKS EB under product options. GO FOR IT!