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.
Types of thyroid cancer include: 1  Papillary thyroid cancer. 2  Follicular thyroid cancer. 3  Medullary thyroid cancer. 4  Anaplastic thyroid cancer. 5  Thyroid lymphoma. 6  Symptoms. 7  Risk factors.