Heater core?
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5th Wheeling
Joined: Sep 2017
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Heater core?
My heater core is leaking. 79 f100 custom 300, 3sp 2wd short bed. Napa says I have 2 options standard heat and high output. They are different sizes. I have not pulled mine yet to see, as I have been busy with my kids. Napa can only get high output as the standard is sold out nation wide. My question is are they interchangeable. Like if my truck was a standard will a high output fit?
Grumpy goat
Joined: May 2017
Posts: 3,058
Likes: 596
My heater core is leaking. 79 f100 custom 300, 3sp 2wd short bed. Napa says I have 2 options standard heat and high output. They are different sizes. I have not pulled mine yet to see, as I have been busy with my kids. Napa can only get high output as the standard is sold out nation wide. My question is are they interchangeable. Like if my truck was a standard will a high output fit?
More Turbo
Joined: Nov 2018
Posts: 563
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From: CA
Logistics Pro
Joined: Jul 2005
Posts: 4,217
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I don't think they're interchangeable. My truck has high output heat. A long time ago, I changed the heater core and could only find a standard size core. It was smaller than my old one but fit. However, most of the forced air went around the heater core. There was almost no heat.
Grumpy goat
Joined: May 2017
Posts: 3,058
Likes: 596
I think you want to source a heater core for a 1973 Mustang, or something like that. Number Dummy said that the truck High Output Heater is really just a Mustang heater box assembly - but I forget the exact year Mustang. And it's pretty safe to assume that the '71 and '72 Mustangs would be the same as well.
Hotshot
Joined: Apr 2009
Posts: 14,333
Likes: 247
From: Stanley, VA
Rockauto shows having them available.
https://www.rockauto.com/en/catalog/...ater+core,6864
And, if needed, the standard heater housing can be modified to fit the HO heater core.
https://www.rockauto.com/en/catalog/...ater+core,6864
And, if needed, the standard heater housing can be modified to fit the HO heater core.
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