This is what I did, engine hasn't grenaded yet. Pay attention to whatever units you are reading...ft-lb, in-lb, Nm.

I screen-shot this just for your post directly from the manual .pdf I have on my computer. It's about as good as it gets.

Engine torque specs typically have less to do with the yield strength of the bolt and more revolved about the necessary clamping force and the material they are threading into. M8 bolts like the ones at the top of the heads are threaded into the cast iron block. The rocker bolts are threading into an aluminum head. The cast and al also have different thermal expansion rates.

That being said, follow the manual unless you have a remarkably good reason to stray from it. 195in-lbs.