It is the tie rod. A diagram from LMC
https://www.lmctruck.com/1967-72-che...-4-wheel-drive They only sell the tie rod ends, notice "tie rod ends". If those are the ends, the center is the tie rod. Look for used in parts forum. I have seen them new, just do not remember the manufacturer.
Quick search turned this up
https://www.oreillyauto.com/detail/c...tie+rod&pos=11 Measured and the stock tie rod is 52"