Dual Exhaust bracket hanger for an SS

I have read a number of posts about a dual exhaust bracket hanger being welded to the frame to help identify an SS. What does this thing look like? Is it a thin piece of metal or is it pretty stout? My 68 SS has 2 pieces welded in about the right location, but they are probably 3/8" thick steel and it looks pretty much "not factory". They look pretty rough, like they were cut with a torch. Would someone have welded these in to stiffen the frame where it makes its bend around the axle?