Can someone please

Should be obvious. Weld in some sleeves.

I have a mig but I really don't believe I would be able to get it right. I'm leaning more towards swapping in my 74 V8 K-mem. Isn't a 74 K-mem the same for slant and v8? If so, besides brake changes, i'll just have to get some 74 slant 6 mounts. Or is that info completely wrong?