Need i.d. measurement on a D60 front

[thatK30guy]

On both spring perch center bolt holes.

Bought some new center pins for the zero-rates I have to install on some springs and the round heads look a little big in diameter.
I don't have a D60 laying around without springs on it and now need you guys who do, to get a quick spec on both holes for me.
I may have to grind a little bit of material off the head, don't know for sure yet until I can measure both.

TIA.

 

[74757685k5]

9/16 should fit

 

[sweetk30]

stock center pin is 3/8 thread. thay might have given you ford 7/16 pins. that will also make you need to open up the leaf holes and perch holes not a fun job.

 

[readymix]

9/16