On a gasser you'd want to keep your RPM at peak torque. You'll need to find the HP/Torque curves for your engine. And you'll need a tach of course.
On a long climb it's best to occasionally back off the throttle occasionally for a moment. That's supposed to help keep the manifolds from turning cherry red and also allows the computer to adjust itself. You try not to climb all the way to the top with it floored. And if there is a pull over at the top perhaps at a view point don't shut down a hot engine without letting it cool off for a few minutes.
There's an art to mountain driving. Lots of info available here on the forum. Do some searches.