408 hyd roller, too much spring pressure?

I will bite. I run a Crane 669931 HR, which is 230/238, .528"/.548" with Manley NexTek beehive springs #221438 on Edelbrock heads.

Caveat: my cam has a billet core, however, I also run T&D 1.65 rockers, so I have a reasonably aggressive street set-up with .584"/.603" lift at the valve (measured). Heads have 2.05/1.60 valves.

LS style beehives drop straight in to Edlebrock heads. I've also just done an LS beehive spring conversion on a Ford 302 Windsor with GT40P heads. Yes, I like beehives.

Back to my 408 Mopar . . . Seat pressure is 170lb and open pressure is 380lb. Rev limiter is set to 6800rpm and I shift at 6500rpm. The engine will rev to 7000rpm but there is not point as it's all over by around 6200rpm.

I saved a lot of sprung weight going to a beehive, as the retainers and locks are lighter, as is the spring itself. The springs have been in the engine for over eight years now with a best of 11.666@121mph with a slippy clutch. It's a manual.

Nothing wrong with beehives for the right application.