I am using this in my 510:
https://www.amazon.com/gp/product/B081JN8S8X/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1
It works really good. What's nice is it is GPS so you don't have to worry about what gear you will need with a specific tire size. I haven't had any problems with this particular brand. I also used it in my 41 Ford. It does take a few seconds at first to find a signal, but once it does it is very accurate. What is also nice about this particular one is you can program the odometer. So instead of starting at 0, you can program it to show the current mileage showing on your odometer.
But if you want something nice and also multiple gauges like tach, oil pressure, water temp and voltage, then I would go with Speedhut. They are more expensive but they look like good quality stuff. I haven't used them because I just can't afford them.
https://speedhut.com/