Zeller, Jerebko, PHI 2nd (basically late first), any other 2nds, max cash.
If need be they can have Hunter, Rozier, Mickey, or Young, or possibly a future Celtics pick (since we're going to be a top team).
I think Stevens would love Gasol, and he'd play the most minutes of our bigs. IT would love him in the pick and roll, he's a great spacer (better than anyone big our team aside from Sully) and he's an amazing passer (so everyone else will love playing with him too). Fits Brad perfectly.
Gasol makes us a strong contender, but only for 2 years. I'd take the gamble, but not for Sully, or the DAL or MEM pick.