Pac 1248 spring , 1.80 int rocker, 1.75 exh rocker. Cam is .500imt .490exh . Anyone got any thoughts?

We had two sets break springs after 30 runs. Ours were set up too far from coil bind and cavitated. We went to a bigger spring and shimmed it up. Now we've gone to a more reasonable cam we probably don't need the crazy spring pressures.
I recently found a crack on the exhaust rocker boss on #1. Leaking water.
It's easy to go too far fixing it too.

Was running the same spring. Had issues with unstable valve train and breaking. Changed to psi with exact same setup and problems gone...