Was wondering if anyone here has done this swap into a 67 to 72 chevy truck? I have a 72 1 ton extendid cab dually and am thinking about going this route. I now have 4.10 gears and am running Cooper C-140 8r-19.5 tires that measure 34" tall... is this a good ratio for this combination? I also have a divorced 2 speed auxillary transmission so I could go with either the 465 4 speed or the Th-475. Last question for now, is anyone making a motor mount kit that would simplify fabbing one up?