I suggest you wait for a better spot. I would agree with Right Side, that Milwaukee hasn't been worth shit in the run scoring department, but they have managed to get some homers the past few games. (They still have a dreadful amount of runners left in scoring position this season, though.) The over 8 is at -125 at my book, and that's too much juice to lay.
Educated guess for me would be to take the Phills if I had to.