[mickmate]

It is just a 5 on 4.75" small GM pattern on the Jag stuff. It is easy to get a 5 pin adapter kit for knockoffs but the backspacing is something you will have to pay attention to. I have a couple of notes on Contemporary wheels to help you through the process but you would be advised to take the wheels off the back and get a flange to flange measurement as there were some variations on hubs, arms and resultant track widths.
We have a Contemporary forum on here too which is helpful.