Type 912 engine cross section, 14 November 1969, 31 × 47 in.

Assembly guide for Type 912 engine to 917 gearbox with firing order, 19 September 1969, 17 × 29 in.

Type 912 injection system, 18 November 1969, two pieces, 44 × 36 in., each (with significant ink splotches)

Interestingly, the Type 912 is Porsche's internal code for the 917. Not to be confused with the model 912, which was simply a marketing name for the four-cylinder 911.