I have a 1992 notch with the stock engine. Nothing has ever been replaced and it has 196,000 on it. I bought the car about 5 1/2 years ago with 145,000 already on it. I have but about as many bolt on's that are possible and now I have purchased a GT40 intake (FRPP NOT the explorer) a set of gt40 iron heads and I'm looking at a TFS stage 1 cam. What kind of power increase am I looking at getting??? Also the compression is great in the motor. I ran it on nitrous about 2 years ago and got a 13.1 @ 107 mph with a 1.7 60 foot.