hey guys i jsut found out i have a 3.73 LSD in my parts car is this rare? its an 82. so now i have a 4.3 a 4.1 and a 3.73. is it a good idea to swap this into my 86 (4.3). my 86 whines and howls all the time. will the 3.73 bolt right up to my 86??