I don't really have info on the 57 Chevy truck as such. Been around several and they can be really nicely done up.

What you need to do is ask yourself some serious questions. Do you like the design of the pickup? Is it really salvageable? Pratically anything is if you are willing to work on it. Do you have the time and skills to put into the project and how much work is it going to take? Answer these questions and you'll know what to do.

Always remember, you are building your rod or project for you, not to make anyone else happy. Follow your desires and you'll be happy.