Lightening Tricks For 68 HDT Dart

In my '73 Duster, a four speed car, I built two trannys using the aluminum case, side cover and extension housing from a three speed with OD. Both were the 833's. The weight difference was forty one pounds from the stock cast iron. The internals I used in one for a back up was a 23 spline, the one in the car was an 18 spline. Both were for the A body, large output, not the B or E body extension housings and mainshaft. I had to have the slip yoke modified to fit the output shaft and the extension housing, I didn't have the large output aluminum extension housing for an A body. I didn't even know they made one, but I know better now because I have one sitting here.