408 hyd roller, too much spring pressure?

I don't think anyone is really arguing with you on that point, geometry would be the first place to look at if you want a happy and stable valvetrain, get that sorted, select springs that suit your requirements (beehive or conventional as long as it suits the application) and if you can save some weight in the process then that's a bonus.
I was surprised when my B3 kit arrived how far things needed to move:

View attachment 1715975938
Nice. What springs are you running?

FWIW, my 1.65 T&D shaft rockers were spot on for geometry straight out of the box on a set of Eddy RPMs. They were heavy and needed more spring than expected, but c'est la vie.