What do you mean by insulators? the rubber bumper (which needs to be loose until the whole thing is in position) or the black plastic spacers that attach to the chrome bumper hoops?

Judging from the wheels and paint, you probably don't care, but the correct way for the bolts to be installed is from below with the nuts showing on the top; most restos get this wrong.

Those '70 Coronet front ends are a bit of a beotch aren't they?

Dave