Wayne, you misunderstand what horsepower is. It is the rate at which you can do work, "work" defined as applying a force through a distance. That force may be causing acceleration (F=ma), it may be overcoming friction (aerodynamic or rolling resistance), or it can be lifting weight against gravity. In the case of a car accelerating uphill, the engine is doing all three.
I have read your fantastic posts about your 150 mph Chevy; if you say it's true, then I guess it must be so. But it is HORSEPOWER, not gearing, that got you up to 150. If all you needed to go fast is the right gears, then every rice-burner with a five-speed overdrive transmission would go over 140 mph. Fact is, most cars cannot maintain the same top speed in overdrive that they can in the next higher gear: the power isn't there to overcome aerodynamic resistance.
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Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
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