1972 Cutlass S rebuild Suggestions - ClassicOldsmobile.com


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Old August 12th, 2018, 06:36 PM   #1  
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1972 Cutlass S rebuild Suggestions

I have a 72 Cutlass that Iím having trouble deciding what to do with. Iíve thought about cloning it to a 442 and if I did that I would like it to have a 455. Trouble is that I find it extremely difficult to find a 455 that isnít in another car and I donít want/need 2 projects. My car currently has the original 350 it came with, and Iím leaning towards just having that rebuilt. Iím curious what you all think?
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Old August 12th, 2018, 07:09 PM   #2  
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Old August 12th, 2018, 07:31 PM   #3  
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What's your budget for the engine?
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Old August 12th, 2018, 07:52 PM   #4  
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What's your budget for the engine?
With a buy and rebuild maybe around $4K, the big thing Iím looking for if I buy though is that the 455 be out of a cutlass and not a different model
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Old August 12th, 2018, 08:57 PM   #5  
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Spend a little extra now and get a 455. No replacement for displacement. Any 455 would be good does't matter what model it came from originally if your going to rebuild it. I would look for something with C E G or Ga heads and avoid the J. D F and H would be nice too but seeing as they are w30 heads probably not likely.
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Old August 12th, 2018, 10:04 PM   #6  
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With a buy and rebuild maybe around $4K, the big thing Iím looking for if I buy though is that the 455 be out of a cutlass and not a different model
Not sure why you think a 455 out of a Cutlass is different than any other 455. If you're set on a 455, don't be overly picky, get any one you can find.

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Old August 13th, 2018, 05:55 AM   #7  
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Not sure why you think a 455 out of a Cutlass is different than any other 455. If you're set on a 455, don't be overly picky, get any one you can find.
Not all engines are created equal. Just because they are all 455s doesnít mean they all produce the same hp/torque. The cylinder walls may be thinner on some, and parts/mounts will be in different locations.
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Old August 13th, 2018, 10:35 AM   #8  
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Not all engines are created equal. Just because they are all 455s doesnít mean they all produce the same hp/torque. The cylinder walls may be thinner on some, and parts/mounts will be in different locations.
In that regard, Olds made it easy. All 455's had the same bones, Whether its from a Cutlass, 442 or F/S they all have the same basic block. Like a previous poster opined, J heads are considered worse for a performance build but they can be worked with depending on your goals. Plenty of guys run them on healthy street engines. Re brackets/pulleys/pumps etc all that stuff transfers from your current 350 to a 455,
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Old August 13th, 2018, 11:45 AM   #9  
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Not all engines are created equal. Just because they are all 455s doesnít mean they all produce the same hp/torque. The cylinder walls may be thinner on some, and parts/mounts will be in different locations.
Whuuuut?? That's just not true. The 455 is block 396021 F. That's the same casting from 68-76 so I hardly think they're any different. Kenneth is spot on, you can build a 455 out of any Olds. If you're concerned about making it look period correct, then look for a GA block. It can come from any Cutlass (good luck with that because they didn't make more than around 1200 of them in 72), or from a B/C car or even an E platform.
From our Tech editor and VERY knowledgeable Olds expert who has addressed this issue so many times in the past I'm sure he's sick of it....

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Every single Olds V8 from 1964-1990 is dimensionally identical externally except for the deck height differences from small block to big block. Motor mount holes, crank centerline, and bellhousing bolt pattern are all exactly the same on every single one.
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So as far as HP and torque? Yes, you're correct that some produced more, some less. That depends on the heads and cam that was used among other things. If you get a long or short block, you have the option to build it to your own specs. If you do build a torque monster though, I would suggest you either bullet proof your TH350 or simply get a TH400 with the engine you buy. Both will likely need a rebuild anyway.

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Old August 13th, 2018, 11:53 AM   #10  
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455 uses anchor 2261 engine mounts.
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