If you have an HEI distributor with a Tach Output you can use the Tach Output from the distributor. Due to the high voltage of the signal from the HEI you should use a tachometer filter to prevent damage to the tachometer. Coil Pack or Individual Coils (Distributorless Ignitions).
Yes, thyroid disease can affect your mood â primarily causing either anxiety or depression. Generally, the more severe the thyroid disease, the more severe the mood changes. If you have an overactive thyroid (hyperthyroidism), you may experience: 1  Unusual nervousness. 2  Restlessness. 3  Anxiety. 4  Irritability.
Signs and symptoms of thyroid cancer. Prompt attention to signs and symptoms is the best way to diagnose most thyroid cancers early. Thyroid cancer can cause any of the following signs or symptoms: 1  A lump in the neck, sometimes growing quickly.2  Swelling in the neck.3  Pain in the front of the neck, sometimes going up to the ears.4  Hoarseness or other voice changes that do not go away. 5  Trouble swallowing. 6  Trouble breathing.hyroid cancer can cause any of the following signs or symptoms: 1  A lump in the neck, sometimes growing quickly. 2  Swelling in the neck. 3  Pain in the front of the neck, sometimes going up to the ears. 4  Hoarseness or other voice changes that do not go away. 5  Trouble swallowing. 6  Trouble breathing.