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1970 Cutlass Supreme Radiator

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Old Oct 25, 2025 | 04:37 AM
  #1  
eh70's Avatar
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1970 Cutlass Supreme Radiator

I'm trying to figure out what the original radiator in my car would have been to look at options for replacement without modifying anything else. 1970 Cutlass Supreme, 350, AT with AC (which I currently have deleted). The car did not have a rad in it when I got it. The saddles are still on the support and I have the upper cover and shroud. Just looking for something close to stock that I can use with the original fan clutch and shroud. The engine is mostly stock and I'm in the northeast so overheating should not be an issue. Can I tell how many rows the original had by the saddles or measuring something on the upper cover? I'm guessing with it being a small block, it would have been a 2 or 3 core?

Thanks.
Old Oct 25, 2025 | 04:57 AM
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70sgeek's Avatar
'72 Cutlass ragtop
 
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From: Tampa, FL
This is basically a drop in replacement aluminum rad which works very well and budget-friendly - lines up properly with the AT lines and looks generally like a factory rad.

https://www.autocityclassic.com/chev...tor-sl-282-at/

If you have more to spend you can also look at Cold Case and Be Cool aluminum radiators, which are also excellent. Be Cool offers a black option as well if maintaining a factory appearance is your preference and don't want to paint a bare aluminum radiator yourself. I have the black version Be Cool in my '72 ragtop and it's awesome.
Old Oct 25, 2025 | 05:01 AM
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Originally Posted by 70sgeek
This is basically a drop in replacement aluminum rad which works very well and budget-friendly - lines up properly with the AT lines and looks generally like a factory rad.

https://www.autocityclassic.com/chev...tor-sl-282-at/

If you have more to spend you can also look at Cold Case and Be Cool aluminum radiators, which are also excellent. Be Cool offers a black option as well if maintaining a factory appearance is your preference and don't want to paint a bare aluminum radiator yourself. I have the black version Be Cool in my '72 ragtop and it's awesome.
That looks great. And to confirm, you can use this with the factory fan clutch and shroud (vs having to use their aftermarket electric fans)?
Old Oct 25, 2025 | 05:09 AM
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70sgeek's Avatar
'72 Cutlass ragtop
 
Joined: Jun 2016
Posts: 1,321
From: Tampa, FL
Yep - that's how mine is set up and here in FL, my temps rarely go higher than 190 with a 180 T-stat. In my case, I'm also using a 7-blade GM fan from a '76 Corvette and a Carquest p/n 215046 thermal fan clutch
Old Oct 25, 2025 | 06:19 AM
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Thanks!
Old Oct 25, 2025 | 10:46 AM
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Originally Posted by eh70
I'm guessing with it being a small block, it would have been a 2 or 3 core?
With AC should be 3 row.
Old Oct 25, 2025 | 02:34 PM
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Originally Posted by Fun71
With AC should be 3 row.
Thank you.
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