Engine-wise, I remember that the carburetor on our '72 B300 Dodge required frequent cleaning/replacement and the automatic choke setup had a thermostat spring inside the exhaust manifold that needed cleaning out to work.The coil became intermittent and engine would die suddenly leaving no power steering. There was a large connector on the right side of the firewall that bought electrical power through the dash including a fusible link that gave problems I think that a transmission cooling radiator was added in front of the engine radiator. There was also a ceramic resistor on the firewall that could burn out,carry an extra. You may need to deal with changing wheels to accept modern radial tires.
