Has anyone installed an adjustable rocker kit for a Mopar SB (360 specifically)? Like this one, https://www.jegs.com/i/PRW/228/3331811/10002/-. This is my first Mopar and I am just used to adjusting the valves on SBC to help tuning and improve performance.

 

I have an older PRW set which I haven't run but did set up to find good geometry. Since then I have read these do not have the best geometry, but can be corrected with custom shaft shims. I have heard the same thing with some higher end rocker systems as well.

I would strongly suggest buying one or two individual rockers, of any manufacturer, set them up and check geometry, if they check out ok buy that set and you'll have a couple of spares just in case.