1999 Chevrolet 1 ton dually k3500

I have for sale a 1999 Chevrolet dually 4 wheel drive with automatic transmission and a junk 7.4 vortex motor. Body is in pretty good condition with some bondo on the passenger door. The motor was supposed too have been overhauled before I got it, I had driven it around the yard and loaded and unloaded it on trailer, but when I took it out on the highway to make sure the tranmission was ok, the motor locked up, so I can't verify the transmission is good. Long story short, I drained the oil pan and it had 2 gallons of antifreeze in it, could be a bad head gasket or a hole in the block. It doesn't turn over. Anyway you are buying AS IS, price is $3800

Thanks for looking