Ok I a converting a 22r to power steering and the single bolt that holds the tension-er pulley to the block on the front.
I can only get 1 1/2 threads in before it stops...so be
fore i tap or chase it,I want to make sure it is a 10mm 1.25.
Thanks Here is my project 1982 toyota sunrader SAS conversion.

 

M10x1.25 is correct

Your using a new bolt

Using the correct hole ?? Broken bolt in the hole already

This is Bolting to the head just like if it was Factory ??