This Fits Your 1979 Volvo 240 1.7l SideDraught Carb
Full size assembly image of Heater unit (1/6)
Heater unit (1/6) Heater unit (2/6) Heater unit (3/6) Heater unit (4/6) Heater unit (5/6) Heater unit (6/6)

Heater unit