Mid 70's 360 motor mysterious water leak

Tooljunkie said
RRR,thats a great idea, but i havent seen studs that long in my travels,t-rod is unacceptable.
Guess long grade 8 bolts and cut head off and thread.

I'm not sure, but I know a manager of a bolt ware house that I can ask about finding a long stud like that, but yeah, that would be great. Do you suppose using the red thread lock would be required, or should blue work?