if its just rusty it can be saved if you take the time to do it , one the fuel sending unit is toast also but still can be brought new , the way I cleaned the rust out of my tank was remove tank from car and wash out with diesel , next is to find a old bareque pit motor and rig it up to hold the tank to it , next is to go to a pet store and get two large bags of fish tank gravel and pour into tank , fill with a gallon of water and plug up tank , turn on motor and run for 8 hours or more , wash out the remains of rust and gravel , inside of tank should be very shinny , if you have a few very small pin holes no problem , next buy some sloushing compound for motorcycle tanks , it seals the inside of tank , it must be dry before you pour it into tank and sloush it around and drain and dry ,and repeat , tank should be good to go , done it a few times over the years and its works , hope this helps , later Blaine