I finally took my truck to a shop that fabricates leaf springs, but the tech didn't have info on the arching for a 37 1/2 ton's front and rear leaves. I provided him the specs (from the GM Heritage center) but he said it was still not the info he needed; I'm sure he can figure something out on his own but I'd like to give him something definitive.

Any idea where I can find "arching" info?

Thanks,
Mike