340 Build
FWIW, it looks like this is the OP's cam:
Hughes SEH3236AL-8
Hughes Engines
2800+ recommended stall on the TC
Hughes recommended valve spring is their 1129 on their cam card. Dual coils, no damper, taller to be used with Edelbrock heads. So that basically sounds in line. Seems like it ought to go well past 6000 with this. (Can't recall if the Edelbrock spring seats meet this requirement noted for these springs but probably does.
"Note: Spring base must be machined flat on OEM heads. Both springs must set on the same surface." )