They didn't come from the factory (Lincoln) with temp gauges. The base model L200 engine doesn't even have a 'knock out' on the engine for one. The f162's do. Petronix and Perlux have discontinued the tower and hold down clamp for the F162 prior to 1965. This head has a smaller distributor hole, just a heads up to anyone looking to change from the magneto to the distributor.