Pulling the inner valve spring at cam break in?

Yes, 375 @ .600 lift. There are so many different springs out there with varying pressures I can't say what yours would be with the inner spring removed



I measured several sets and at the moment I don't remember which ones those were. A buddy of mine bought them at a estate sale and just asked me to verify if the springs matched the boxes they were in. Just for fun I pulled the inner spring on one to measure it and that's the one I was referring too. As mentioned above the open pressure of that spring combo was 375 @ .600



Uh, I didn't think this was your thread? I just threw in the spec on the inner spring for Mopekid since he commented that he thought inner springs may not really do much

I really can't understand the fuss about removing the inner springs. You assemble the heads with just the outer springs, break in the cam, then pull the valve covers and install the inner springs. About 1 to 1-1/2 hrs worth of work doesn't seem like a big deal to me!!!!!!!

Exactly. A small amount of labor to pay for doing it right.