I feel your pain man, the rust is a cancer that always gets worse. Same thing happened to my 91Z. The engine ran strong but the car was rusting out all over the place. It was so bad even the fuel lines above the fuel cell rusted through and it started pissing gas all over the road. Needless to say that was the day I decided it wasn't worth fixing and the car went up for sale. She was good to me for almost six years and I hated to get rid of her. Sucks to hear that both your cars are crappers though. Hope you can find something that is a bit more reliable.