[1955cj5]

I forgot to get a picture of the heads of the studs(slotted screws) before I insulated them, but there is an adequate gap as long as the screws are tight.

A little more clearance sure wouldn't hurt though.

I'd probably glue or somehow attach the washers to the box, as fiddling with the screws while holding the box from opposite sides of the firewall was was quite enough frustration....