K frame ?

Sometimes they are "cut up" to replicate the direct connection big block k-member (or could be one bought over the parts counter in the 80s) If it is cut like that, you might be able to get some decent money for it. I just put a 73 k in my 67 barracuda. On the second page towards the bottom of my build thread you can see the reinforcement I did on the new K. This is similar to what firm feel does.