I don't know what the factory gauge range is however it is easy to verify the reading on the Autometer gauge. With the engine cold take the radiator cap off, insert a thermometer (many of the cooking thermometers will work fine, just don't tell your wife) Start the car and let it warmup, compare the reading on the thermometer in the radiator to the Autometer reading. Another way is with a hand held IR thermometer that you can point at the thermostat housing. Even though 210 degrees is a very long way away from boiling at this temperature the thermostat is fully open and you are getting as much cooling as possible from the radiator. You can check the back of an antifreeze jug to get an idea what temperature you could boil. If you don' already have one it is a good idea to use a high flow thermostat such as the following Milodon unit that is available from many sources: http://chucker54.stores.yahoo.net/thermostats.html Dennis C. incoming.verizon.net wrote: > > Ok I have a question. On my 64 Dodge 440 Max Wedge clone, I have my > factory > temp gauge and a Auto Meter temp gauge. When the auto meter gauge reads > > about 210, and I look at my factory gauge, it reads in the normal > range. Is > there some way to check which is more accurate?? I remember back in the > day > I had a new 63 Plymouth 426 Maxi and we drove it all over the place and > it > never got hot.. Thanks, Harry > > > > 1964 Dodge > 1970 AAR Cuda > > 1996 Dodge Ram 3500 Van Conversion 1964 Plymouth Belvedere 318 Auto 1963 Plymouth Sport Fury 383 4-speed 1949 Dodge Pickup 289/C4 soon to be changed 1998 Honda Valkyrie Standard ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.