Help with Valvesprings and valve float. Noob

I agree with PRH. Also to note, with your current setup you are probably very close to coil bind.

I will also add that a 408/eddy head motor with a small hydro cam doesn't need to get spun up that high to make good power. I agree that it should be able to pull to 6000, but it will probably max out below 5800.
I agree but I should be able to wing it without it scattering to hell and sounding like death. I can't even get to the end of the track before it falls apart.
4:30 gear. 28" tall tire.
I have friends with stroker small blocks with similar set ups and zero issues. Same gear tire combo.