67 Barracuda Big Block K frame keep it or change it ??

Did anything need to be done? Weren't the stock K members pretty strong, slant six or otherwise? I'm not arguing, just asking. I haven't seen a slew of K member failures down through history because they had a big block on um. ..........unless I've just missed it. Which is certainly possible.
I believe other than Hemi K frames they were all basically the same except for the engine mounting points. Hemi Ks got a skidplate to protect a 6 quart oil pan, motor mounts were way different than a regular big block, however the basic architecture is probably even the same with them too.