SM465 trans from a 83 c2500. I LS swapped this pickup and must not have adjusted something right because the clutch plate blew up after only 5000 miles. So I pulled the whole trans and installed a 4L80e instead. I took the top cover off of this and the internals looked good to me. I have a new throw out bearing, 5.3 LS pilot bearing, pressure plate and clutch plate with all associated hardware for this as well. I did crack the aluminum bell housing when I removed this.