I have a bad habit of keeping EVERYTHING which is in half decent shape from parts cars before scrapping, and I have an overflowing parts room to prove it. 3/4 of the stuff I keep I know I'll never need, but then again, you never know. Plus, selling parts is a great way to recoup project money, and somebody always needs something. I would most def. keep the rack if it's in adequate shape. Hell, even if it isn't, core value alone is worth holding onto it.
SGinNE