im deciding to ship my 1998 gts to chuck tators tomorrow. im from central jersey and everyone suggested chuck hes about 80 miles away from me have to tow the beast. he told me to have a local mechanic take off the valve cover to see if anything is wrong with the rockers. the car was off when we took off the cover and everything looked fine. we put the cover back on and when we reved the car it started making the knocking noise. when i first heard the noise the car was given an oil change the next day. the oil filter had copper shavings and it was very low on oil. the car starts and idles good and the oil guage is at 40. what do u guys think it is and how much money would it cost and would the whole engine need to be rebuilt. i think chuck rebuilds in house