Hello and welcome!
The truck looks to be in great shape, I think she's a keeper
The value is mostly in your own feelings for keeping these old trucks in service. Dollar wise not so much. Most folks modify them to their hearts content due to the relatively low collectors value. To each his own...
I would leave the windshield alone as long as it doesn't leak. I am thinking of painting my bumpers white to match my roof and wheels, the grill I will leave chrome for the reason you stated, need to break up the colors a bit.
Good luck and have fun!