[VintageUpgrades]

Look under the dash behind the glovebox and cut the wire-ties. Pull the hoses down. Pull both hoses loose from the motor, pull the heater control knob, and flush heater core with water. Look under the center of the dash and remove the two clamps per hose. At the firewall, twist the hose out. This will usually pull out the rubber grommet from around the hose. Good Luck