Engine covered in this Porsche repair manual:

* 3.2 liter 6-cylinder (930/21 and 930/25), horizontally opposed, air cooled.

This manual includes a complete engine disassembly and rebuilding guide, with full details on techniques and specifications, as well as camshaft and timing chain replacement techniques with engine in car.

Transmissions covered:

* 915 (5-speed, with cable-operated clutch)

* G50 (5-speed, with hydraulic clutch)

Complete removal and disassembly guide, including clutch disassembly, clutch cable and linkage rebuilding, clutch hydraulics service