My 351c is spraying oil out the dipstick tube. It only happens at higher rpm's, starting at around 4k or so. If I have more oil in, it sprays sooner, with less oil, it doesnt really spray at all. The problem is with less oil, I get pressure drops on corners, so I don't let it get too low. Problem started recently, but until recently I havent gone much over 4k, so I didnt noticea problem. It kinda drips out the dipstick tube at 4k, at 5k it will move the dipstick out, and spray a bit. What would be causing this? There isn't a lot of blowby coming out the valve covers, compression is good, and it happens wether i have the pcv hooked up or not. I don't know what could be causing this, anyone have some suggestions on what to do/check or do I need to replace something?