Does anyone have any info on the early diesel 4L80E controllers like what years to look for.Any info would be great,maybe some web links that I could look into. I picked up a good 4L80 core about 2 years ago from my favorite old fashion junkyard(no computers/old timer) for $50. with intensions of rebuilding it.I am going to start to tear it down soon and wondered what year it was and have it narrowed down to 97-2001 based on the bellhousing having seven bolt holes for a LS1 motor. I got this info from the PATC website and according to them its the best of the best and they even charge extra to use that case. I want to hook it to a LoMax and have that part worked out awhile back in the big how to hook a 4l80 to a 205 thread. Heres a picture of the output shaft that I am going to use and a picture of the 7bolt bell.