Is the bolt that secures the timing device "reverse" threaded?

Also--someone on these forums suggested (from experience) to use a credit card between the timing chain and timing device teeth to remove the device. Something about manually rotating the crank whilst inserting the credit card between the chain and teeth as it rotates.
Feasibility anyone?

And how do you maintain camshaft timing in such a procedure?

Is it difficult to remove the timing device from the injector pump shaft once the bolt is removed? And to install?

If only Haynes made a manual...