(Not a) 350 Chevy Small Block?
Incorrect. Only Chevorlet engines of that era are designated as small-blocks. Fords have engine famlies 335, etc. Mopars(Chrysler), have series LA, B and RB(raised blocks), etc. GM's have groups amoung the various divisions. Pontiac 326 thru 455, Buick(wet manifold), 350-455. And Oldsmobile 330-455. Nowhere did GM refer to its Oldsmobile engines as big or small blocks. So when you're talking about 60's-70's engines and you say "small-block", you are refering to(unknowingly or not), Chevy 265-400 engines.
No, we don't. Only people who don't know any better talk about big and small block Pontiacs (well, techincally, the 301 and 267 DO have a shorter deck height than the other Pontiac motors). The generally accepted distinction among Olds motors is that the short deck motors are small blocks and the tall deck motors are big blocks. That means that a 400 is a big block and a 403 is a small block.

No, we don't. Only people who don't know any better talk about big and small block Pontiacs (well, techincally, the 301 and 267 DO have a shorter deck height than the other Pontiac motors). The generally accepted distinction among Olds motors is that the short deck motors are small blocks and the tall deck motors are big blocks. That means that a 400 is a big block and a 403 is a small block.
OK I'll go for that. If you want to refer to an Oldsmobile 350(for ex.), as a short-deck engine as opposed to a 455(or 394/400/425), then I'll sort-of agree. However if you say 455 its understood(amoung Olds. guys), that its just not some super-stroked, hogged-out "350-based" motor of the same external demensions that the factory managed to get 455 cubic inches out of in '68. Many of the internal/unit pieces are bacically interchangeable amoung the series(330-455), whereas the Chevorlet 350 shares very little in those respects with it larger counterpart 454, so only Chevy's are small/big blocks, and I'm obviously including motors like the 283/305/327/400 and 402/396/427. As far as Pontiacs/Buicks go they(GM), did the same thing. So BOP motors aren't small/big blocks period, stop calling them that, it adds to the confusion and seemily unending debates. Mopars are raised blocks and I think Ford used some numbers and I'm not even sure if many Ford guys can recite that modified 351, 400, Windsor, Cleveland, Boss, side-oiler 427, Cobra-jet 428 and 460 engine family class designations from memory, I can't. I know they made a bunch of 351's for various applications.
Last edited by blueRAYwhale; Mar 29, 2010 at 01:16 PM. Reason: "mis-spelled some stuff"
The 400, 425, and 455 deck is about 1 inch taller then the SBO. The blocks share a similar design, but sb has a shorter deck then the bbo. The 403 a sbo has larger bore then the 455, but has a stroke is sorter, which is the same stroke shared with other sbo.
Also the 351 windsor is a small block and you forgot the 360 and 390 bbf
Also the 351 windsor is a small block and you forgot the 360 and 390 bbf

OK I'll go for that. If you want to refer to an Oldsmobile 350(for ex.), as a short-deck engine as opposed to a 455(or 394/400/425), then I'll sort-of agree. However if you say 455 its understood(amoung Olds. guys), that its just not some super-stroked, hogged-out "350-based" motor of the same external demensions that the factory managed to get 455 cubic inches out of in '68. Many of the internal/unit pieces are bacically interchangeable amoung the series(330-455), whereas the Chevorlet 350 shares very little in those respects with it larger counterpart 454, so only Chevy's are small/big blocks, and I'm obviously including motors like the 283/305/327/400 and 402/396/427. As far as Pontiacs/Buicks go they(GM), did the same thing. So BOP motors aren't small/big blocks period, stop calling them that, it adds to the confusion and seemily unending debates. Mopars are raised blocks and I think Ford used some numbers and I'm not even sure if many Ford guys can recite that modified 351, 400, Windsor, Cleveland, Boss, side-oiler 427, Cobra-jet 428 and 460 engine family class designations from memory, I can't. I know they made a bunch of 351's for various applications.
the blocks are smaller on the 330 and 350 only in deck height, 2" i think, and are bigger on the 400 425 455, even the heads can interchange with some work, big block and small block is just a general term to differentiate the two distinct engine groups.
I can't say that I follow your point here, but as far as Olds is concerned, first the 394 is a completely different engine design from the 1964-1990 motors. The terms BBO and SBO are pretty well defined in the community here, and I don't think anyone would be confused by them. The reality is that there is no official definition of "big block" or "small block", even where Chevy motors are concerned. The LS family shares virtually nothing with the traditional SBC, yet people still call them SBCs. As for the Fords, again, I'm not sure of your point. Ford has the Windsor family (221, 260, 289, 302, 351W), the related Cleveland family (351C, 351M, 400), the FE family (352, 390, 406, 427, 428), and the 385 family (429 and 460). Of course now there's the mod motor family and the even newer motors that include the recently released 5.0 in the 2010 Mustang. Chrysler has the A-series, the B-series, and the RB-series (the latter two having a relationship similar to the SBO and BBO), in addition to the new Hemi and whatever the 4.7 motors are called.
You said it youself, Chevys are big/small blocks, the word virtual, whats that mean? Can a 350 Olds. camshaft be installed in a 455 Olds.? Yes. Were Chrysler motors ever known as small blocks? No. Were Ford motors ever knowned as big blocks? No. I see these different engine groupings 385 or whatever, yeah thats what they were. The big Chevy's were big blocks and those small Chevy's were small blocks, not Y blocks or anything else. Maybe, just a suggestion Oldsmobile needs to get their own cool name, wait they already do, and it isn't small/big block, its Rallye 350 or W-25 or W-30 or Four Fifty Five. And that's my point. I didn't jack someone thread, and I'm not trying to help out some lady or convince anyone of any thing. Just trying to explain that Oldsmobile engines of the sixties and seventies aren't small and big blocks, only Chevy's.


I'm glad someone appriciates the effort. Also hi! to my neighbor to the south(Clark County). I was there recently in Sept. of 2009. I live in Carson City. We went and saw MILEY CYRUS, who totally ROCKS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! at the Thomas and Mack Arena, ROCK ON MILEY! I'm not sure if you saw any of my other posts/comments? It's true, I would give you a whole box of stuff for that '70 Olds. I have a 1976 and I'm hoping to get another one soon so I can put a 455 into it I pulled out of a '73 Oldsmobile 98, overhauled it, I have a short shaft TurboHyrdra-Matic(TM) 400 trans., cross-member and wiring, along with HD radiators, etc. In my humble opinion I would say do not listen to these people who are trying to convince other people that Oldsmobile engines of the 60's and 70's are big/small blocks. One of these days you're going to, if you're fortunate enough, wind-up in some out of the way auto shop or repair garage trying to get some repair work done on your car. You'll know the one I'm talking about when you see it, it's got those old beater looking, half-repaired works in progress, street rod lookin' cars out front. Do not look into the engine bay of a 1971 Chevy Chevelle and try to convince the owner they do not have a small block Chevy in there, irregardless of what other people post here or elsewhere. Those are the guys you're going to need to keep that car on the road, cheap. They know the braking systems, suspension systems, engine controll systems inside and out, frontwords and back. They have earned a living doing this and they absolutely have small block engines, bunch's of them, and with all due respect, they ain't Oldsmobiles.


I'm glad someone appriciates the effort. Also hi! to my neighbor to the south(Clark County). I was there recently in Sept. of 2009. I live in Carson City. We went and saw MILEY CYRUS, who totally ROCKS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! at the Thomas and Mack Arena, ROCK ON MILEY!
Maybe she could get Jimmy Page to play banjo?
Not quite April 1st yet but close enough.

What can I say. It would be a honor for both of them to perform together. I'm looking forward to the early April Blu-ray release of her Wonderworld tour disc, I think it was recorded in London. Cool, I'm sure it will have the DTS MA 7.1 track on it. I hope more artists use this format. The first Disney B'ray to use it was her '08 Best of Both Worlds concert.
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