I concur on new springs. Not only is pressure a consideration, but age can also promote breakage. I've changed a broken spring with the engine installed, which means changing them all for insurance, and it isn't a fun project.

 

Yes the recall of changing a broken valve spring with the engine in the vehicle years ago, is what made me reconsider getting and installing new springs now, while the heads are still off.

Got the cam from Summit today also.

Thnaks,