heater box interchange

[Ranidart70]

will a 68 satellite non a/c heater box work in a non a/c 70 road runner?

How much difference between 68-70 heater boxes?

 

[Mark B]

68 69 and 70 b body non A/C boxes are interchangeable.

 

[beezee]

The 70 heater core uses 2 different hoses 1/2 and 5/8