It is pretty tight depending on how you're bringing it in to install it. I have found a fairly easy way to hook one up without damaging the paint. If you bring the shield in from the front, the tub is more narrow.
Loosely install the spacers and brackets to the tub. Lay a blanket over the hood. Use a blanket large enough to fall over the tub edge where the shield arms are mounted. Carefully lay the shield on the blanketed hood. The shield should be resting on the hood blocks, as if it's been flipped down. Move the shield position so one arm can be bolted to the bracket. Loosely bolt this side, then go to the other side. Position the final arm and bolt it up.
Flip it up to make final adjustments, then tighten the mounting bolts.
It is unlikely the arms are bent in, but I suppose it could happen. It's hard to measure the distance between the arms while the shield is installed. I measured a spare. 46-3/8". I can't verify this is accurate, but this shield was installed on one of my Willys when I brought it home.
Hopefully this helps a little.
Tim
