My 2001 Dodge Ram pickup won't pass smog. The reason is due to either a cracked head near cylinder #6 or a head gasket leak. I tried alumiseal and a copper sealer treatment. They didn't work. The truck is a base model truck and has a few good sized dents in the body and also is in need of tires like yesterday. Interior is good. How much to fix the engine, and/or should I just sell it to the highest bidder?