@Charred - There is a certain amount of protection that is already available for your car, although not in the form of stuffing boxes.
Your oil pump and water pump each has a pump seal to prevent leakage, and these seals are fairly inexpensive items that you can buy from any auto parts store.
The only problem is that if the seals break you’re out of luck. But as I said, they are easy to replace and a little leakage won’t hurt your engine. It will just make your driveway messy.