Correction, it's a 4-stage process as described later in the thread.

It's a 3-stage process. Torque all bolts to first stage, torque all bolts to second stage, give all bolts a quarter turn (IIRC the 3rd stage is 90* but you should confirm).

Try this site to convert Nm to lb-ft - http://www.onlineconversion.com/torque.htm

Sixto
87 300D