road car cam for my 318

I will disagree with the above.

The somewhat "granny" 1st in the 833OD is less of a hinderance and more of an advantage with a numerically lower final drive ratio.

However, a cam that has an operational range above the cruise RPM is certainly an issue.

Find one that "comes in" sooner, even one that's "done" at 4500.

Puts all your torque in the real world operating range.

Just above idle at freeway speed is not a bad thing.