Regarding retrofitting the 160 amp alternator for the hemi engine. I just read an interesting article of which I'll post a couple of paragraphs. I think I will reconsider putting the 160 amp unit in my truck.
Note the bit about the high amp alternator:
Two options are available to handle a higher amp draw. One is to add a
dealer-installed 160-amp alternator. The 160-amp alternator is available on the
Ram 2500 series truck as a part of the Snow Plow Prep package. The difficulty of
retrofitting this factory alternator at the dealer level depends on the engine.
The high-amp alternator is a drop-in, bolt-on replacement on the Ram 1500 with
the 4.7L engine. However, putting this 160-amp alternator on a HEMI-powered Ram
1500 requires a change in drive belt, engine pulley and idler pulley, in
addition to the obvious harness and termination lead changes and the alternator
On the topic of power draw, the “heavy service” package includes a 700-amp
battery from the 2500/3500 models, replacing the 600-amp battery, which is
standard on the Ram 1500. The Ram we tested had the 750-amp battery, which comes
with the optional Trailer Tow Group.
I happen to have the tow package with the 750 amp battery. As I do more research I'm finding I probably have enough "juice" for my application. I sure don't want to get into an "involved" project that initially started out as just a noisy alternator bearing replacement