I'm conservative, but I wouldn't push him to 80-85, unless you're in a 6-man rotation. In a 5-man he'll want to go 60/65 or 65/70 at most.
By the way, in Nashville I don't think he's all that great a pitcher, at least not so great that you should be bending over backwards to wring every inning out of him. On most of my contending teams he'd be an LRA. If you're playing in a park that really really kills HRs, like OKC, I might start him, or try him as a SuA at 25/35 and see if you can get 100-110 7th and 8th innings out of him. But in-game and between-game fatigue are going to worsen his performance if you try to get more than about 130 innings out of him, and he's not so good that you'd rather have him pitching fatigued than the rest of your staff pitching rested.