It might be wrong, but I just went off of a common bolt torque chart minus a few pounds.
https://www.portlandbolt.com/technical/bolt-torque-chart/#bolt-torque-gr2
Being conservative (not wanting to break a stud and create another mess), I went off the Grade 2 bolt numbers.
I also started in the center and tightened in expanding circles. I have re-torqued them 2 times after running.
Good luck!