Crossover Tube and Valve Spring Pressure Questions

RustyRatRod said
If you wanna stay hydraulic, put some good anti pump up lifters in it and run .002" lash. Howards Cams 91712. Those will change the ball game for you.

This.

You have plenty of spring imo. My buds 340 crossed the finish line a hair over 7k with a similar setup. 273 rockers and ran a Torker to boot. :)

As far as the oil mods, as long as have 6qt+ oil capacity, i don't think it's needed.