81 cutlass it had a 225 in and I’m replacing it with a 455 but don’t know what type radiation I’ll need

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81GBody

n00b
Jan 18, 2021
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Can anyone give me any recommendations as to that kind of radiator I’ll need to fit my G body and motor size
 

fleming442

Captain Tenneal
Dec 26, 2013
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The normal V8 radiator in aluminum will work fine IF you don't put Speed Pro/TRW pistons in too tight. They need .004-.005 piston to bore clearance. Otherwise, no amount of radiator will cool it.
 
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81GBody

n00b
Jan 18, 2021
2
1
3
The normal V8 radiator in aluminum will work fine IF you don't put Speed Pro/TRW pistons in too tight. They need .004-.005 piston to bore clearance. Otherwise, no amount of radiator will cool it.
Thank you, much appreciated brother.
 
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Bonnewagon

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Sep 18, 2009
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When I had a Pontiac 400 in my '81 Malibu wagon, I used a junkyard V-6 three row brass radiator from an AC car. It worked so well when it broke I replaced it with a brand new same type. The 400 never overheated. But in my '83 wagon I went with a new V-8 two row aluminum that was rated as a 4 row. It is only a 301 engine but even with the AC on in traffic in July it doesn't overheat.
 
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