Can you run the holes for the 5 on 4.5" all the way through your rear adapter? That way you could use them to mock up the fronts.
You can just release the torsion bars and jack the lower control arm back to ride height. Then put your adapter and rim on the car and turn the wheel side to side. Might have to hold the rim against the car if you can't bolt it on. Should have another person help you.
