340 What's it worth?

All of the intake valves were slightly tapping the pistons. One valve stem broke and the valve head went thru the center of the piston and stuck there. It did not wreck the cylinder. My phone will not let me upload the photos so I will try when I get home from work. The numbers on the pad are OB183694 and the casting numbers are 2780930-340-6 it was cast on 7/14/69. AOK engines is located in central Minnesota near Brainerd. I don't want to stick any more money into it. I have a 360 in my Duster now. I know I wont get what I have into it but if I can't get a decent price for it it will sit on the engine stand for a while. I had 6 miles on the motor when it blew and was only at 3200 rpm. It was my own stupidity that caused it.