I'm on a dial up so vids won't work for me.

From what you describe, the rocker shaft will likely be worn as well. New bushings will help but not solve the entire problem.

Bushings of this type generally will be pressed into place then honed to fit, this will take care of some of the shaft wear. ( bushings are undersized when new, think connecting rod pin bushings for full floating pistons. ) But, . .since the center of shaft is worn and not the edges, the bushing can only be made so tight.

What sort of use does this car see? If limited use I'd be OK with bushings being honed on the tight side, pushed over the unworn section to the worn section and call it a day.