The lens looks like it's from something other than an Explorer. But maybe I'm not looking at it right. Regardless, if the vehicle is otherwise in good running condition, it may be best to use it for your transportation needs after the lens is replaced. You'll learn from it (and hopefully also from your grandfather) about vehicle maintenance and repairs before you find the Daytona of your dreams. The Daytona also had a problem common to Mopars of the era: after so many miles (or years), the power steering fluid would leak from the steering box. Maybe this was one of the problems your Mom had with the dealer. A friend of my brother had such a leak, and when he took it to the dealer, they replaced various hoses and the power steering pump without solving the problem, before finally replacing the steering box. Some dealers are worse than others about this; you might be better off with a local independent mechanic. If you find a Daytona without power steering, you won't have this problem.