How to torque drive shaft bolts?

Or, tighten them up till they snap, and then back them of 1/2 a turn!:twisted:

A quick update!

Using a 120mm extension on a normal socket I was able to torque the cardan coupling end of the front drive shaft.

The diff end was more difficult and I resorted to using a couple of ring spanners, but for future reference, a shallow socket (normally found in the small cheap socket sets), an adapter or two plus the extension piece and I am sure these bolts could be torqued as well.

Thanks to all who gave me their suggestions! :)