I have a question along the same lines. I got the intake and exhaust cams of the left side of my engine but man the right ones are on there. I stripped out the hex on the cam shaft while holding to break the bolt free.... Its just a little stripped and I'm drilling the bolts out now. The cam is still fine to use with that little stripping of the hex portion correct. I don't see how it could possibly make a difference but I thought I'd ask.