I'm dropping the \6 out of my 67 Belvedere today, and noticed that the steering box bolts are a larger size than the V8 K-member I have to replace it. (supposed to be a 66 or 67) I have a 64 one that has the smaller bolt diameter, one out of a 69 B-body that takes the larger bolt size. So, is the supposed 66-7 K-frame a 65 or earlier? Looks like I'll use the 69 one, everything should be the same, correct?