Next week a Keisler TKO 500 5 speed kit arrives (with hyd clutch kit and spec clutch) to replace the 4 speed Toploader in my 68. So it will have a new trans, clutch, driveshaft/u-joints and a hyd clutch actuator. With all of that work going on, is there anything related that I should do that has been missed? 8" rear diff was rebuilt about 3k mi. ago w/ the 5 rib waffle cover. Thanks.