The problem I had with the replacement rear bolts
was they were turned a few tenths to large and had
to be taken down in the lathe to fit the bracket bore.
http://www.pbase.com/dennygraham/image/122103083 Then there was the poor machine work on the reproduction bolt.
Just below the head the shank looked like they had pulled
the tool bit out before it reached the end of the cut and
left a taper for about an 1/8". This would not allow the
bolt to seat properly. Took care of that in the lathe also.
http://www.pbase.com/dennygraham/image/122103104 Denny Graham
Sandwich, IL