Hey guys last night I was driving down the interstate say about 80 MPH taching about 3K with no problems. After I get off the interstate I am about to pull onto the highway and I here my car making a pretty loud tapping/ticking noise. I go to pull on the road and I could almost swear it was skipping. In the higher RPMS it seems to do OK but idleing it sounds and runs odd. I pulled into a gas station and the noise seems to eminate from the L.H. Valve cover rather loudly. But after some driving, the noise and skip go away. It only seems to do this right after getting off the interstate, and I am afraid it may be a sticking lifter or valve. I was curious if anyone has had similar problems? I have run Mobil 10w-30 Synthetic blend since I have owned the car, and I usually add an additive at oil changes. I have used Lucas most of the time, but this particular oil change I added Rislone Oil Treatment. I think I have had this problem for a while, but it seems to have gotten worse. I my fears are confirmed and it is a sticking valve/lifter, I guess I will just rebuild the heads. New head gaskets, Lifter, valve seals, maybe valve springs, and a port and polish maybe? I would guess that would do the trick. Thanks for any suggestions. Later.