Congratulations! A high output alternator is a good choice.
You will need to drive it with a good pair of at least 1/2" industrial grade belts matched.
I recommend you drive that alternator separately to spare your water pump from the loading required to drive the alternator. Whereas the water pump is recirculating and requires little belt tension, that alternator will require HD belting adjusted tightly due to its approximately 5 hp loading at load. Don't forget the belt dressing.
A smart regulator will be a wise choice and with distribution controls can result in an efficient and reliable electrical system with the high output alternator at the heart of it.