My battery has been dieing, while idling and letting it sit. I have an amp and sub, stock 42 amp alternator (80 jimmy)I believe and a battery that leaks a lot of acid. Can I just put in an 80 amp alternator without changing wires? and what battery should I use? One more thing, anyone have an idea on the cost to replace a windshield seal? I think I might just get a car, don't really want payments but my Jimmy is falling apart.