Man, that is why I originially built my hybrid instead of using the 3L heads. I put in the 3L valves but kept my stock heads mainly for the waterpump issues. I felt the stock pump with updated impeller was sufficient and more reliable. Plus the money I saved on the pump was equivalent to the valve work.
I loved that motor! Or those heads I should say.
Now quickSVT has them and hasn't used them.
If I were you and DIDN't have a way to control fan temps and other factors like timing, I'd just stick with stock. If I had time to experiment and pin down just what benefits the 160 may give with special tuning, then I might try it.
Those three things are the deciding factor, time, tuning, or no-worries use what is designed.
