Any gains adding 1.6 rockers to stock 273?

I actually was not trying to modify the motor. One of the valves was "Ticking". Inspection found the ball worn off the adjuster. When looking for a replacment, I found the 1.6 rockers. So I asked if anyone had info. since I don't know the particulars on this motor.

In fact I am trying to NOT modify the motor significantly. It is definitely a slug, so I am planing on changing to a 4bbl., but I don't want to "get into" the motor unless I have to. I know the slippery slope that could lead too.

Maybe one day after multiple other projects I might add turbos, or install a 383 I have, or even a 6.4 hemi. But for now I just was a fun cruiser to play in.