Hi Dan,
No, I'm getting the standard Jag rear and standard front-end as well. I'll ask Doug for more details but the fitment has to do with all the parts that must work together to turn a lug nut set-up into the pin drive set-up. I clearly don't understand it yet and, since I don't have the car, haven't had the chance to examine the parts. If I was receiving lots of feedback that fitting the 5-pin wheels is problematic it would be easy to make the decision to spend $$ for the 6-pin setup, but not seeing that so far. Apparently Kevin (KGS365) got some feedback from ERA that they had some issues, but haven't heard that from anyone else yet.
Maybe I should consider putting that money toward having ERA assemble the front suspension
Regards,
Kevin