We were already talking pm, I mentioned the engine killing risk of the manual LP & gave EP158 or FASS recommendation.
The 24v starter is great. All the way until you have to replace it.
In the military- a report I read said #1 injury of wheeled mechanics was the 165# tires on hmmwvs. The #2 injury is replacing the starter. Your starter is way more than double the weight of a normal starter. So be seriously careful when you do have to change it. The 24volt starter does an amazing job spinning the engine really fast to help starting. If you do swap to the 12 volt- get the PowerMaster 9052. There is a different front support bracket you need for it but those are cheap and plentiful. For hummer/hmmwv guys who replace the huge starter like yours- I tell them buy 2 powermasters. Two of them are still cheaper than one prestolite and weighs less. They just have to find a spot to carry the spare
Your prestolite is advertised as waterproof but once they have 15,000 miles of heat on them, they often are not sealed anymore. Being sealed traps the carbon from the brushes as they wear causing a shorter life. So guys who dont waterford a lot will remove the seals. The powermaster isn’t waterproof but several guys (including me) have put them underwater with no issues because it dries out fast. Powermaster cranks about same rpm as 24volt. The regular AC Delco and other 12v starters spin much slower making cold starts worse