hi there! i just finished my 84 le sabre limited 4 door. in it i stuffed 1968 430 buick engine,with 500 hp, and a tci street fighter th400 trans. my gears are 3.73's in the stock housing. it is very fast, and wild! my other buicks include a 92 roadmaster limited 4 door,with 250,200 miles,and a 91 le sabre 4 door with 195,400 miles. GO BUICK!!