This 100%
My factory V8 K-member was a lost cause, cracks everywhere, I had the same with a crack on the steering box mount. I tried fixing the LCA pivot mounts only to find more cracks.
Yes I could've got another good factory one from out of state, after searching for a month the best deal I got was one in Nebraska, even after shipping the cost was only $100 cheaper than a new QA1 K-member.
And, yes it's $100 cheaper, HOWEVER it was another 45ish year old factory part at the time and pictures don't show everything that could be wrong (cracks and other issues) with it until you see it in person. So I elected to get a new one, might as well for peace of mind.