What is the rpm sweet spot for highway driving

1970Duster said
Depends on your cam. What are your cam specs.

Here ya go.

Duration @ 0.006": 256° / 268° Duration @ 0.050": 212° / 218°
Max Lift w/ 1.5RR: .447" / .454" Lobe Separation: 110°
Intake Centerline: 106°