Alright this is what i got, its a 98 gt automatic trans, recently it has started knocking on cold starts and when it is reved to about 2 grand. ive had a guy tell me it is one of the rods on the lower end , and what im needing to know what would be cheaper,, to fix the problem and build the bottom end stronger, or to just pull the motor and start with a different one? and also would the 96-98 cobra motors match up with my auto tranny or not? just any little bit of info would help me. . . . thanks