Agreed value?

So im in the process of putting insurance on my dart. Im going through the application process I think I have decided to use Grundy, in your opinion what do you think I should ask for in the agreed value? I have a 1975 dodge dart swinger. The car isn't done yet I still have do paint and interior. I am thinking 10k is this to much to little? In the unfortunate event the car was totalled I believe 10k would cover what I have in it. Does this sound like a reasonable amount that they would agree to? This is my first time shopping for classic car insurance so I really don't know what to expect. Thanks