How much is my 74 Duster worth?

You'd probably have a hard time giving the body alone away, my 73 gold duster body was much nicer and I had to crush it for scrap after I pulled the front and rear suspension off. I tried to sell the complete body minus the drivetrain and front and rear suspension and couldn't even get $300. So I pulled every part I could stack in the corner, and scrapped the shell for $150. I have since sold a few parts I pulled and made my $300.
So the value you have is in the driveline and the front and rear suspension, that's about it. On top of that you say drum brakes? So it's small bolt pattern front and rear still? At least if it's in the car and running somebody can check it out somewhat, if they could drive it then even better.