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Old 02-23-2004, 10:51 AM
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pontiac 455 bare block weight

Hey guys,

I just recently purcahsed a '72 455 total bare block from ebay. I have been looking online for how much it weighs but I am getting nowhere. Do any of you guys have any idea?
Thanks fellas!

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Old 02-23-2004, 04:25 PM
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Anybody have an idea?
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Old 02-23-2004, 07:03 PM
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I'm probably wrong but I'll guess 150 lbs.
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Old 02-23-2004, 08:56 PM
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it has to be between 150 and 200 i carried a pont. 350 block down my stairs ( 15 or so) with the cam in it and i made it. good buy. Gotta love the 455.
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Old 02-24-2004, 04:05 AM
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Small-block Chevy bare blocks weigh between 180 & 200 lbs. Pontiac should be a bit heavier. Might email chief@chiefmanyhorses.com . They sell an aftermarket Pontiac block, so they could probably tell you what you need to know.
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Old 02-24-2004, 07:16 AM
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put it on your bath room scale and post your findings,
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Old 02-24-2004, 01:07 PM
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Thanks for the replies guys. I am just trying to get an idea because I was wondering if I needed to take someone with me to lift it in my truck. But if it is 200lbs or under, I will just go myself. Thanks again for the replies guys!

deuce, I will post the weight once I get it home and weighed.
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Old 02-24-2004, 05:52 PM
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a ls1 alluminum block weighs 120 lbs, thats alluminum. i would have to say that a cast 455 woyld weigh in atlest 250! but that is just from what i can guess from my lil knowledge. lol
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Old 02-24-2004, 11:01 PM
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The 455 block is easy to lift with 2 guys. I'm guessing no more than 160 to 175 pounds. I wouldn't want to lift one by myself anymore.
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Old 02-24-2004, 11:17 PM
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Here is what I found;

455 high deck w/accessories, no flywheel=620pds

Engine weight FYI

I am guessing the heads are at around 150-200pds together, crank/pistons/rods must be 100-150pds and another 50-100pds for accessories. That leaves 170-320 pds for the bare block, I'll place my bet at 230pds.
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Old 06-14-2011, 01:27 AM
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graveyard post

I was being lazy rather than go weigh the 421 bare block I am looking to ship. Since nobody could give a definitive answer and googling brought me to this site, I figured I would go weigh the 421. Weight difference between the 421 and 455 can't be too different. The 421 weighed in at 165 Lbs so that should be pretty close to any Pontiac V8 from that era.
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