Good news is I know why the 67-72 K1, 2 engine cross member did not fit as I would have liked. So I tried it in my 72 C30 RV front frame nub. Slide right up to the front mounting holes no problem, so why not the Longhorn was my question??
Bad news is the Longhorn frame we acquired is tweaked a little bit.
Not a big surprise from a 45+ year old truck frame.