Extreme spring pressures needed for high rpm solid rollers can pull the stand studs out of the heads. I don’t like going over 600 lbs open without going to a paired rocker system. Once you have it happen to you once you don’t ever want it to happen again.
If your goal is to turn this over 7000-7500 with a solid roller, I wouldn’t feel comfortable with a regular shaft rocker. Heavy valves, stout cams, and high lift needs a lot of spring pressure.
The cams you are looking at are also universal, the lobes are shared between families. Most of the FE heads, including HR and TP are best served with custom camshafts. I would not choose the cam until the heads are finished, flowed, and your entire combination is locked in. The cam should be about the last part you buy.
