Well, there are 4 different variations of the conquest wheel.
from an archived email I saved last year:
From the Conquest FSM
7" frt 18mm offset 4.70" BS?
8" frt 18mm offset 5.20" BS?
8" rr -10mm offset 4.125" BS
9" rr zero offset or 4.5" BS
the author had the FSM. He was positive on the 9" rear BS and I have a pair of 8" rear, and I just measured the backspace (in the rain, that's dedication!!!)
You will need to open the center register to fit the mopar hub, and the front dust covers will protrude through the center caps (hmm, aftermarket billet Al center caps??) so you'll likely not need those.
There's a red 71 Chally on the west coast with 4 16x8s on his AutoX/Track car. Sorry, I don't have pics of his car at the moment. Also, my car isn't here yet so I can't mock 'em up for ya, either.