High crankcase pressure

I have an 88 toyota 4x4 with a 22re motor 200,000+ miles while driving down the highway it began to quickly lose power and oil. I managed to get it home requiring 6 qts of oil and have since discovered that it is being blown out of the vent in the valve cover pcv valve is ok egr valve vacuum line was plugged but now clear. The crankcase pressure is incredibly high and I dont know why please help