Foreign valve springs in a Magnum

stryker63 said

Yes, that's them.

I'm now concerned that I may have over-torqued some of the other bolts as well - should I bite the bullet and order new sets?

I'm wondering if this is a sign that I should have gone with Harland-Sharp roller rockers?

What does everyone think?

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I would not order new rockers, but you will need new bolts, because the bolts will stretch when over torqued. Those rockers may work for your set up. I may have missed it, but is the block an LA or a roller? Did the engine builder spec out the pushrods? Meaning did he measure for the correct length pushrod? If the pushrods are the correct length then I would run the factory rockers. My only concern is coil bind in your spring, because if I recall those springs on magnums are only good for around .510"-.520" lift (I may be wrong). Factory rocker are 1.6 ratio and with your .506" lift cam then that will put you well over that.