Your daughter wants a "look at me" Rod, not an old classic truck. Sell that one, buy one already done or more done. The orig engines are good engines, I would get it running. It won't have the pep she wants, she won't want to shift, and specially not want to go SLOW like these trucks did when new. I don't condone the "Hacker" actions of switching bodies to where they don't belong myself. 12 volt and better brakes are a good change, plus the appearance items. Radial tires maybe. Keep it stock! Vendors are full of parts to swap over to V-8's and stuff. Chevs of the 40's has one of nicest catalogs with good pictures.