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.
There are four main types of thyroid cancer: 1  Papillary thyroid cancer: The most common type of thyroid cancer. 2  Follicular thyroid cancer. HÃ¼rthle cell carcinoma is a form of follicular thyroid cancer and is treated the same way. 3  Medullary thyroid cancer.  Anaplastic thyroid cancer.