300 amps alternator Prostar Cummins ISX

[ian2021]

I have a 2016 Prostar with Cummins ISX, 8 batteries, 4 for the truck and 4 for EPU unit. The truck has a 300 amps Delco Remy alternator, part # 8600414.
There is was a noise when starting the truck and when pressing the acceleration pedal. I took the belts off, inspected the pulleys and tensioners and discovered there is a small play in the alternator bearings. The new alternator is around $2000 and I cannot find any places to rebuild it.
Is it ok to install a 200 amps alternator, part 8600314, I do have a spare one.
Did somebody installed a lower amps alternator?
Thank you.

[Nostalgic]

I ran a 160 amp "$300" Bosch alternator for years with 4 starting/4 deep cycle batteries for electric APU with a simple voltage disconnect, and then moving to 4 agm/4 lifepo4 with a dc/dc charger. I upgraded this year to a brushless 240 amp Delco, 8600338, to give me a little quicker charge for <$1k. Pays to shop around and see if your local dealer will price match. All depends on how long you drive daily if it's enough to recharge and what kinds of loads you have while driving.

[Yauchout]

the 320 amp is $1730 at fleetpride almost $200 cheaper then the 300 amp that being said you can get a 270 amp for right around $1000 from the same place im not really sure what your budget is though... just go to fleetpride's website and search for the 40si