Steering All Over the Place at 55mph+

67Mungo said

Thanks OldManMopar. They are definitely the 73+ ball joints as I put them in myself. Originally I ordered them for a 67 and that's when I discovered the suspension was something newer and found the 73 e body ball joints fit. This is probably for another thread, but if it was originally a slant six car would they have had to put a new k member in to accommodate the 340? If so would that require a new steering system? Any way to tell the 67 idler arm vs 68/69 and would it fit right up? My apologies as I'm not a pro at this like y'all on the thread! I enjoy doing the work but have more questions than answers and genuinely appreciate everyone taking time to explain these things to me!

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they wouldn't necessarily have swapped the K because there are conversion mounts available for /6=>SB and if they did swap the K it would more than likely been to the 73~76 style. regardless, the steering is all the same-- caveat being the 67 only idler arm.

so i'd hazard a guess that they just swapped the UCA's and spindles and left everything else alone.

while the 67 is "bayonet mount" there's nothing inherently dangerous about it. not ideal from a performance stand point and the idler's are expensive though. you can't just swap them, though. the connection/mount is entirely differen. post up some pics and we'd be able to tell you what you've got.

like others have said, get a *good* alignment and then assess the situation from there.