Welcome to the site and the hobby! The M939 series trucks are fun and very useful. There are lots of guys on here who will be happy to help.
Re: hard tops, I’d say whatever you can get your hands on, though of course fiberglass won’t rust. As for your alternator and wanting an upgrade to...
Ken, I feel ya. These trucks aren’t just a truck. This hobby changed and probably saved my life. My current circumstances are entirely a result of these trucks. Thanks for sharing.
There is nothing like these trucks.
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