Back when I was a "youngun", I had a few toys, like a Ford with a 2.75:1 ratio differential, a Nova with a 2.41:1 ratio differential, and a Pontiac with a 2.56:1 ratio differential. I built them for... let's call it "highway use". I would occasionally race guys whose cars had 4.11 or similar ratios but the rule was "First gear only" if it was from a dead stop. When I whupped their butts they whined and called me a cheater, because they thought it should only be okay for them to have a gearing advantage. I also once had an old beater Dodge pickup with a just slightly warmed over 360, but it had a 4.56:1 ratio differential. It beat a heck of a lot of big bucks street rods in the stop light to stop light races. Seems a rolling start would have let some of those whiners win. Then again, top end on that Dodge was about 100 mph although it got there in around the length of a city block, so it still would have beat a lot of them in a rolling start race up to 100 mph. Not bad for a $500 truck built with swap meet parts. I believe that if an idea is for having fun, especially when trying to do it with safety in mind, I'd have to say go for it.
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