I have a 87 8v GTI. The car dies after 4000RPM, it has no power. Once in a while bluish smoke comes from exhaust but not all the time. The car consumes a guart of oil in about a week. Also when I fill with oil to mark on the dip stick, the car is very sluggish. But when oil is low the car feels a lot better. Also I replaced the clutch and the pedal is still very stiff? What is it? Also is it very hard to rebuild the cylinder head if valve seals are what is causing the bluish smoke. I might want to do a ABA block swap! I have a 1.8 16v head that I just resently aquired. Will that work on top of a ABA block?