Chassis Dilemma

[Jamesbb]

Over a year ago i purchased a 1950 Chevy truck. It has been a long road and i have came to an issue that im not sure what to do. The more i look at the chassis the more unsure i am of the quality of it. The pics im including should give some idea of what im seeing. The chassis has alot of rust and pitting. The problem is i have already installed a heidts front end, and gotten a 4 link for the rear, but i have not installed it yet. I am wondering if there is anything i should do to strengthen the chassis, or should i scrap the frame and the frontend and get an aftermarket frame. I really dont have the money for the frame which would set me back alot on the build, but i want what is right. Any suggestions will be appreciated.