I'm getting crankcase pressure issues with my freshly rebuilt 318. I had this issue before and it ended up being from some bent exhaust pushrods that was caused by a lack of oiling since my rocker shafts were on wrong. I found the issue really early and didn't appear to do any real damage to the cam. The issue has kinda crept back but not as severe. I'm getting a little bit of oil in my valve cover breather and out the front of my intake. I have a PCV and tested to make sure it was functioning properly. I did a compression test and all cylinders were between 135-145. I took the valve covers off and made sure all the push rods were spinning freely so I don't think any of them got bent again. So now I'm out of ideas. I'm not getting an issues at idle or just driving around so I'm not sure the valves guides are the source of the problem. It seems to be an issue at high loads + high rpms so I'm thinking it may be another oiling related issue. I went with a high volume oil pump and a windage tray but stuck with a stock 4 qt oil pan. I'm think the issue might be the lack of volume and/or baffling in the pan but I'd like more input before I pull the trigger on anything. I did a hillclimb/cruise a month ago and that seemed to be the worst of it by far. During one of the steeper climbs there was enough oil coming from under the breather to leak onto the headers and cause a small amount of smoke under the hood. Am I on the right track here?