Where is the fan located on a 59 stud generator?

Depends on which 24 stud (year). If you are talking the '38 (& my '39 std), the fan was mounted to the front of the generator. "59" blocks had a fan that hung from the front of the intake.

Does a 59 block have a fan?

If you are talking the '38 (& my '39 std), the fan was mounted to the front of the generator. "59" blocks had a fan that hung from the front of the intake. To keep the stock fan on mine w/ 3 carbs, the original generator was "sectioned." Middle was cut out, & front & rear bearings retained. Does that help?

Does a 39 Deluxe have a fan on the generator?

As 1pickup mentioned, a 39 std has the fan on the generator. A 39 Deluxe would have had the fan mounted to the end of the crank. What I have is a 59AB with an alternator installed. The fan would hit the hoses if it were adapted to the alt. It would hit the sheet metal below the rad if it were mounted on the crank.

How do you mount a fan on a multi carb manifold?

With a multi carb manifold or just an alternator with non-Ford mount plate there are several strategies to mount the fan where Ford put it, using Ford bits, aftermarket bracket, or very simple constructions of plates witha few holes drilled. Sounds like this is not an uncommon issue.