Put a solid cam in it with some real springs and be done with it.

IMO, the MP 933 spring is technically a better match for the 509 cam than the Comp 911.

My main gripe with the 911 is its way too far away from coil bind with most typical hyd cams.
Installed at 1.900, it's .200 away from bind at .500 lift, which is a little more of an invitation for spring surge than a spring with similar pressures, that's a bit closer to coil bind.

The MP 933 spring is fairly high rate, and is getting close to being maxed out at .500 lift.

There aren't many cams that I feel the 933 spring is a good match for, but the MP 509 and 484 cams are two that I feel are.

It i "had to" run a hyd cam, I'd use the Hy-lift B-2330S lifters adjusted at zero preload and a spring package set up for like 140/340.

A good read on the pitfalls of hyd cams and high rpm is the old Mopar Muscle article by Dulcich in 2005(iirc), "mild mannered mauler".