Topic: 64.5 vs 66 lower rear shock mounts / spring seats

[CW4macret]

I was going thru my stuff looking for the rear leaf spring seats to clean up when I noticed the difference between the ones from my 64.5 and the ones from a 66 parts car I have. The 64.5 are beveled and slightly smaller than the 66.

 

[GT500KR]

They look like they are bent from over tightening, or rust expansion between the plate and the leaf spring.

[CharlesTurner]

They bend because the nuts used did not have the large flare at the base like we are used to seeing.  I pulled a pair of these off the pace car coupe I restored and they were bent the same way.  Didn't notice the differences in the edges, might have to restore the originals now that you pointed that out, lol!

[C5ZZ]

Could the difference just be the matter of a different supplier?

[CW4macret]

When I layed the right one on the left one they are beviled exactly the same. Could be from over tightening or no washers I guess if they were tightened to the same spec. Anyone else out there with a 64.5 that can look at yours?

[GT500KR]

 My 64 1/2 spring seats look exactly like that too. I dismissed it as either over tightening, or rust expansion, as there was flaking, stratified rust filling the gap when I disassembled them. Caspian65 might be right with the flared nuts / bending theory though. I'll have to look and see which way my car was equipped. (Have to find the bin they are stored in though )
 I have some un bent parts from a later car that I had intended to use, and IMHO they look like same part, same vendor.