REAR SHACKLE BUSHING SIZE????

[fwc]

91 Jimmy with stock springs...Getting ready to order poly bushings for my rear spring shackles (shackle to frame) and they are asking what the frame hole inner diameter is:
1-3/8, 1-1/2, or 1-3/4? Do I need to measure or should I have 1-3/8?

 

[az-k5]

most are 1.5 or 1-3/8, or at least the couple of sets I have done. There is a steel collar inside a lot of them that when removed will fit the 1.5" style.


[edit] thinking of OD on shackle tubing [edit]

 

[big83chevy4x4]

mine was 1 3/8"