For cars with collapsible columns those work. But some years early As, the earlier ones, dont collapse. So have to either cut shaft OR swap to a column that collapses.
I would always prefer a collapsible shaft. I have little concern cutting anything when it concerns safety.
How interchangeable are steering shafts in the 60's cars?
Does using two separate u joints with an intermediate shaft of any length/offset give some safety collapsibility?