Denso is commonly available in a smaller case at 60 amps and larger case at 90 or 120 amps. With stock electric loads, any of the three would probably have adequate output.
There is a "catch". With AC engines usually have different mounts that are not readily adaptable to a different alternator. The distance from top to bottom mount needs to match a factory roundback/squareback.
I would suggest a Powermaster square back (Mancini, Summit, others). It is rated at least 75 AMPs (maybe 90 now). It is new and has a good rep and it would bolt right in and handle your loads. In case of breakdown, a readily available parts store alternator would get you home.
With any of these, I would recommend an upgraded charge wire and one of the strategies to bypass charge current around the bulkhead connector.
