I understand that a steering box can be centered by turning lock-to-lock, counting, and dividing by two. Is this accurate enough???

Did GM put a centering mark on the pitman shaft???

It is a box from a '77 Firebird 400. No...I don't have a Firebird, but it donated it's front subframe to feed my Ford.

I need order and precision in my life, and a mark would make me feel so much better about myself.