The only notable mods under the hood are the Thorley headers, Holley carburetor, MSD ignition, Accel spark plug wires, and MSD coil. Also, an Exide battery has been relocated to the trunk in a battery case. It is typical to find the factory battery tray to be rotted due to fluids leaking from old batteries. It's probably a good idea to move it back there anyway for improved weight distribution. Plus it will be an advantage for a car audio amplifier install later- no need for a stiffening capacitor!