Might be able to use the entire steering assy from a 73-87 chev
Those are my intentions for my father/son 64.
I have been told that a disc conversion is just a matter of swapping upper and lower control arms to trucks w/o torsion bars.
And I thought I read somewhere that the 73-87 box will bolt right on with just drilling one hole for the box and one hole for the replacement idler arm.
There are forums there for all trucks from the 40's to present.
Thanks Kevin45----that will be a great site for me too!!!