Camber, Breather and a Case

Camber issues on IRS

have a Manx-style Buggy using a Beetle pan. The rear wheels are “canted” a bit; I used an IRS. I think it sits pretty much in the stock position. The left/drivers side is worse. The buggy was a bit of a mess when I bought it and I'm wondering if the trailing arms could be bent? I know they were really pitted from rust. Is there any sort of measurements I can take or something I can do to see if they are bent? I'd rather not have to take them off and put on another set just to find out. If they aren't