I was planning on having the hardened seats done, If I drop compression I'll make less power yes?Would it be substantial? I'm planning on running the 041 cam so far, Was thinking I'd only be at 10:1 I'm not going real high on spring pressure, just what's recommended for the cam with roller lifters. I WILL be driving it a fair amount and at least a few times to the lake house in the summer so it'll see 3 hours on the highway. I'll have to look into opening the chambers some, but I've never done that before, I polished, but never changed anything besides smoothing the outside edge. Hmmmmm