Thanks, all!
This large roast had a fair amount of fat on it, but pork in general has become very lean. Even at 170, this roast was moist - I was sure to let it rest when I took it out of the oven. Ralph and I go back and forth as he likes his meats done much rarer than I prefer, so unless we are doing steaks or burgers where we can cook our own to our personal liking, we compromise on big roasts. The "end cuts" are my favorite and then Ralph slices into the middle where it is most rare.
Pork roast in a crock pot is also a wonderful way to prepare it! Always stays moist and tender!!