@Renfrance
Referencing attached pic (click on pic to enlarge), here is the method I've used to remove my alternator:
I've sequenced this procedure so that the Arrows used for labeling do not cross each other (which may get confusing). For your 1st time, this removal procedure may take 45min - 60min.
1. Arrow A - Remove (if applicable) the heater duct hoses from doghouse.
2. Arrow B - Release throttle cable from barrel clamp on throttle linkage. Pull trottle cable from behind doghouse to also remove (slide out) throttle cable tube (make sure to secure throttle cable behind doghouse so it doesn't fall out of reach from engine bay).
3. Arrow C - Undo and remove alternator strap from alternator and alternator/oil-fill stand.
4. Arrow D - Remove alternator fan pulley and fan belt.
5. Arrow E - Detach (-) negative cable from battery then remove wiring from alternator.
6. Arrow F - Remove the four (4) machine screws (or 10mm bolt head screws) from the fan backing plate. The upper left bolt/screw is also used to secure throttle linkage to doghouse (see Arrow B).
7. Arrow G - At the base on each side of the doghouse, there is either a 10mm bolt head screw or flathead machine screw that secures the doghouse to the engine tins on each side. Remove them making sure not to drop them as you do (cuz you know they'll fall into an area not reachable no matter how much you contort and swear).
8. Arrow H - Remove throttle linkage from carburetor trying not to alter adjustment on the connector with carb (perhaps wrap masking tape around the connector and threaded rod to minimize any movement).
With all these attachments removed, you should now be able to lift the doghouse up just enough to tilt out the alternator (still attached to fan backing plate and fan) away from the doghouse.
You may not have the tools to remove the large nut attaching the fan to the alternator (I think this nut is a 19mm), so you may have to seek assistance from a local shop. The fan will have to be re-attached to the new/replacement alternator with the nut torqued to 43ft-lbs.
To re-assemble, reverse method used in removal.
Hope you find this info useful! Good luck with your project.