I know on my S Brothers pushrods cups the OD of the cup is approx. .429 where the same length comp magnum pushrod is approx. .489 od on the cup. .060 might not seem like a lot but in this case one is a no go and one is dead on go.

Yes small block rocker geometry kinda sucks but ya just work around it.

The comp just kisses the rocker when not running so what would it do at 7500 rpm.

There is a 100 ways to skin a cat but I think when each individual finds out what works for them they tend to stick with it.

Im signed up on speedtalk but mainly lurk unless I know I have good positive input, imo its a decent place where a lot of skilled people confer vs argue.