For that time frame, I can't think of any available technology other than a manifold vacuum gauge that you could buy from Pep Boys, that had a custom dial face, which implied recommended throttle use, depending upon a specific performance interest.
The '61 Dodge that was my grandfather's has one, and without some form of restrictor / dampener, it's pretty much 'useless', as the needle swings widely, all over the place, even under really small accelerator pedal movement.
