I have a promo of a 1956 Desoto Fireflite made by Jo-Han and the chassis is warped what can I do to fix it? The chassis is swagged onto the body so I know its old, I just do not want to jump into this half-assed and ruin it. It was part of a collection of Desotos a good friend gave me, out of 10 or so I got this is the worst one. I have searched for this on the forum but did find a good answer, thanks for any help and tips.