Hi John,
I've no diagram but I'd think a picture of a stock engine bay would suffice. I could also email you the relevant pages from the parts manual.
For the 69, you would need to move the coolant recovery tank to the left side of the engine bay. Then acquire the following Series 2 1750 (1971 model year) parts; front airbox cover, plastic duct hose, OVS clamp (which stays on the right side of the engine bay) and the metal duct to which the plastic hose attaches.
Please PM me your email address for the parts book pages.
Jim
The metal lines connect to the injectors with the fitting on the line side. 19mm I think. You may need to hold the injector to keep it from turning with the line fitting. Once the line is off, just unscrew the injector from the manifold.