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 three basic thyroid problems that can come on during your teens: hypothyroidism (too little thyroid hormone), hyperthyroidism (too much thyroid hormone), and goiter (an enlargement of the thyroid gland).Each has different symptoms and causes different problems. Some thyroid problems tend to run in families.here are three basic thyroid problems that can come on during your teens: hypothyroidism (too little thyroid hormone), hyperthyroidism (too much thyroid hormone), and goiter (an enlargement of the thyroid gland). Each has different symptoms and causes different problems. Some thyroid problems tend to run in families.