Possible frame damage.

[drummerdad]

Not a C10 owner, but when I was measuring the D100 frame for reference points, 3/16" wasnt uncommon. The frame rails are also twisted along its length and at the ends. If your worried, call a shop, they might pull it. I would think as long as the suspension is straight and square, and the body sits well, 3/16" isnt a worry. But, Im by no means an expert.