does anyone know a gas tank that will fit between the frame rails at rear of the bed? Just a steel one nothing fancy or 400 bucks.I saw a 64-68 mustang tank seems like it might fit. what have you used?

Im doing the same thing! this is my second 50's f1. This new project of mine was more intact than my first one which came with no engine or trans. I installed a 302 and C4. very simple install. My only sugestion would be if you plan on running the IFS like the Mustang II select the motor mount...