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**aerotruk63** · 06-27-2009, 08:45 AM

According to GM parts book the heater core is the same 60-63. They have a water valve on them. 64-66 has no water valve the control cable activates a flap in the cover of the airbox.

06-27-2009, 08:45 AM	#5
aerotruk63 Check The Champ, Demonstrator Join Date: Jun 2009 Location: Montreal,Quebec Posts: 6,627	Re: heater differences 60-66 According to GM parts book the heater core is the same 60-63. They have a water valve on them. 64-66 has no water valve the control cable activates a flap in the cover of the airbox.