So I have an inline-6 '66 Mustang that has been having starter issues for a good 3 years. In the last 3 years, I've had to replace the starter 4 times, and the starter just went out for a fifth time today. Each time we've replaced the starters, we replace the selonoid as well. I'm wondering if any of you might have an idea to an underlying problem that may be causing the starter to go bad so often. This last time it went bad, I started up the car and it made a metal grinding noise (starter was chewing itself up from the inside), and shut it off. After waiting a few minutes, I tried to start it back up and its only making the "v-room" noises but doesn't start. Any ideas on what might be causing the starters to go bad so often? We've tried different brands of starters, so it isn't one starter is particular that is going bad all the time. Thanks for any advice you can offer!