85 D150 what amp alternator

First post in a long time glad to be back. What AMP alternator are you running? I will like to use a Denso. No big load just stock A/C and stereo. What year model of truck,van,car to use?

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.