block lift question.
 

08 2wd 2.3L 5spd ext cab, no options.
So i made my own blocks for a rear lift.
This picture shows the homemade solid aluminium blocks next to the Auto Zone $30 ones.
In the instructions it says i may have to modify this hole and pin to work with my application.
i am trying to find out what this pin size isso i can make these correcty before i take the truck apart.
i have access to a machine shop,my job, so i can make them but, i cant work on my truck there, (45 min away) and this is my daily driver so i cant have it apart overnite. i dont want to take it apart to get the pin size if i dont have to.
The reason for this is ~ i did a 3" spindle lift, and made some new rear shackles, but i only increaced the distance of the bolt holes 3", which only gave me a net 1" lift, and the shackles are almost hanging below the body.
the pic of the truck doesnt show well, that the front sits higher than the rear, and i am blasting my headlights into rear windows, and dont want to adjust headlites till i get ride hieght corrected.

Some other details: i am not confident in the strength of these blocks from auto zone 2" blocks
homemade blocks are 1 3/4 tall. I am not stacking these, discarding the auto zone specails~ Free if your in cincinnati/ forum member.
Thank you in advance if you have this info and are kind enuf to share.
If i dont get an answer soon, ill find out the hard way and post the dimensions for reference.