My engine's blown apart so this is last on my list of things to do, but I've been curious about it for a while. I know you can purchase a speedometer that runs up to 175 mph. How do you convert to that? A different angle drive or cables or what? I can't imagine that it's a simple as just replacing the gauge. Also, (this may seem wierd) is there a way to set the odometer when you buy it to reflect your actual mileage? Rich A. #5335 -MD