A 3 shoe clutch is no issue i always run 3 shoe but if the noise only started after the modded pisont/sleeve was installed its not the car. If you havent rebuilt the car it can be dry diffs will make screaching noise, bearings can be bad in diff cups causing pinion and diff to lock making screaching noise, and it can be the engines bearings taking a dump. I would rebuild the car by any bearings going bad buy new Avid bearings there only a dollar then put new oils in ur diffs and the noise shouldnt be the car. Now if its the engine it can be because when a sleeve is modded it causes big changes to performance and can harm the engine causing verious noises to occur like pinging and all.