Yeah, I'm looking at the overdrive set up from Silver Sport - it's a GM trans. wide spread on the gears, low 1st, to overdrive 4th. Rear gears would be 3.73s. Does anybody have a scienced out Mopar OD 4speed auto that has all the parts to put it in without beating up the floor pan? I haven't found one and would rather use a Torqueflite of some sort if anybody know of one.