Obviously I can't help on the SA bit But I got my Tailshaft done for $750 Gearbox Yoke was the only thing kept, everything else new and bigger, except the cv got a rebuild [emoji106] Also tailshaft man said that there is two different ZF output yokes, some slide in and some are bolted If yours slides in, it has to be balanced with the shaft and the donut Bolted in ones are balanced at factory