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To be honest, you can likely get a 400 block by calling some machine shops and garages. They seem to know where these engines lurk, and will often warranty the block in such a way that if it proves to have cracks, they will find you another one. This is the easiest way, so you don't have to putz around in a scrap yard and risk getting a bad block. I get my 400 sbc blocks for $125. Then I get tha machinist to prep it fully. It comes to about $350 for everything, and the block is ready for assembly. Naturally you need to get the parts you need on top of the block, but you would be doing that anyway, regardless of where you get the block in the first place.

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Brave man not milk bull... only stupid man
 
400 smallblock is just that, a smallblock, and the 400 BB is a big block. Confusion starts because in early 70 the 396 engines were coming out bored .030 over from the factory, but with the "SS396" name so popular the engines were not listed correctly in parts books. They were listed as 396s in 70, 400s in 71, and finally correct as 402s in 72. Parts books also tried to break this down as the 400 2bbl referring to the smallblock and 400 4bbl the big block. It all just made for a lot of confusion! 400 smallblocks are great low end torque engines while the BB will have more potential for HP in stock form. 400 SB is externally balanced and uses its own special balancer and flexplate. The inner cylinders are siamesed and do not have full water jackets around them, and have steam holes drilled in the block between the cylinders. The heads have matching steam holes, and if you run non 400 heads you need to add the holes. Head gaskets also have the holes. If you run a 400 SB in a camaro get a 4 core radiator to keep it cool. Nothing beats a BB IMO but the 400 smallblock is a great street engine and is easier to install than a BB. I used to find them all the time in 70-76 wagons and impalas cheap. 70-72s are 4 bolt mains and 73 ups are 2 bolt.

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Dave (NY)
66/70 chevelle ss396's
72 chevelle
69/71 camaros
55 chevy prostreet
61 impala bubbletop
 
The 400 SB MUST be bored and honed with a torque plate bolted to the deck to simulate head stress. This will insure a round bore when assembled.
I had a 400 without this step done and after 10,000 miles, it had 50% leak down on all cylinders.
Many but not all SB400's have three soft plugs on the side of the block.
The balancer and flywheel will have an offset weight on it.
Early balancers had the weight on the inside of the balancer hub. Later 400's used a mis shapen outer ring on the balancer and it is obvious.
If the head is off, the steam holes betwen the cyls will show.
With stock heads, build it as a torque engine because head flow will limit power at higher rpm's.
With good flowing heads it will rev more.
David

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Check my web page for First Gen Camaro suspension info:
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67 RS 327
69 Camaro Vintage Racer
65 Lola T-70 Chev 350 Can-Am Vintage Racer
 
hhhmmmm, i belive the small block 400 could be had in Impalas (wagons espescially), pickups, maybe chevelly wagons(maybe)
 
Discussion starter · #27 ·
So if I am correct, a 400sb is not easy to find, even in the USA....so would I ever find one here in Europe??
Guess I will be looking for an Impala AND a Camaro eventually LOL
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Thanks again for all the info,

David
 
The difference between a small block 400 and a big block 400(402) are very big, small blocks are not comparable to big blocks, the cubic inches are the same, but the engine is different, In a way it is like night and day, even though they are both chevy pushrod engines, the only thing they have in common is the cubic discplacement, to get the idea buy a big block book and then compare. Also pontiac doesn't have the bigblock smallblock comparison, all pontiac engines are alike, every engine looks exactly the same, a 326 looks identical to a 455, it is the internals that differ. You can use the same edelbrock heads on a 400 and a 455, so there is no big block pontiac 400, even though pontiac engines are more like a big block in design, rather than a small block. small block 400 are very similar to 350 in appearence, they use the same intake manifold.... the have more cubic displacement which is always better for more power, I have always heard that they have cooling problems. You can find them, but you might have to find one over here, USA and have it shipped. Look on ebay and at for sale places like on this sight. might as well go for a good 350, with the right heads and combo they can make a lot of power, also small blocks rev easier, because of their bore-stroke,
 
What are you going to do with it and what car is it going in. The BB is a better deal because it is not stressed at all at 402 cubes. A SB is right at its practical limit at 400 CI. If you have a first gen Camaro it can be a real pain to put a BB in one if you can't get all the right pieces.
 
Discussion starter · #30 ·
The engine should go into a '67 camaro. The engine MUST be a small block, because the technical inspection here in the Netherlands will NOT approve that I remove a small block and put in a big block. So I want to get as much cid as possible. Another reason is that there are almost no big block camaros driving here and certainly not for sale (at least not for the money I'm lookin for $10000) For this money I only can buy a stock 327
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I'm used to drive fast cars, I've had a Peugeot 205 1.9liter GTi (130hp 0-60mph 7,7 sec and quartermile about +-16,4 sec and drove a Renault 5 GT turbo 1,4liter turbocharged with stock 120hp and 0-60mph 7,2 sec/quartermile +-16,2sec. I replaced the stock Garett T2 0,6 bar boost with a Garett T3 at 2,3 bar boost now: 0-60 6,8 sec / qtr mile +-15,8sec (ok guys....here in europe these are fast
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)
Therefor I want another torqy engine. Not for dragracing, just a streetmachine and some cruising....looking for a victim
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David
 
If you put a 350 with aftermarket aluminum heads a comp cam, intake, 750 carb, and headers, a 2500 stall, turbo 350 with shiftkit, and some 373 rearend gears, which are all very common and cheap for small block chevys you will completly blow the doors off of all those cars! go for the 350 a lot easier and cheaper, chevy 350's must be the easiest engines to get parts for and go fast for cheap
 
Discussion starter · #32 ·
Cody, that 2500 stall, what does that mean (I don't understand that in English, I'm Dutch so...) Does 2500 stall mean that when you start the car, the engine will run stationary at 2500 RPM?
And how is that 350 setup during cruising, and top speed?
I hope to get into the high 12's and/or 0-60 in +-5 sec, is this possible with a 350?

Thanks again,
David


[This message has been edited by DL (edited 11-29-2001).]
 
MR C-I know a carburetor change does not make a small block into a big block! My inference was the 2bbl carb got you the 400 sb,the 4bbl carb got you the 402ci big block.Sheesh!Lighten up!

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HDZ/28
 
The 400 sb is indeed externally balanced. You can pick up and aftermarket crank that is internally balanced for the 400, and you can then use a balancer from a 350. I like to buy new cranks just to be safe anyway.

About the 2500 stall, he is referring to a torque converter which will begin to transfer optimal power at 2500 (which is closer to the engine's peak power piont).

I highly doubt you would be able to find a 400 sb easily in Europe, but it can't hurt to phone around. Otherwise, you could have one shipped in (ouch!).
 
The stall is how much a torque converter slips. The torque converter is like a clutch a little. It will slip (not fully engage) until about 1500 rpms stock, which mean it engages some but not totally, kind of like when you ride the clutch to take off, you rev the engine while slowly let off the clutch, this is what the torque converter is doing, it slowly slips, with high performance engines the cam usually doesn't start making power until 2500 rpms, so you don;t want the torque converter to let out at 1500, then you have about a 1000 rpms until you start making power. So with a 2500-2800 stall converter, it will slip until it hits about 2600, right where your engine starts to make power, when you take off, you nail the gas which makes the rpms jump fast, the torque converter will slip until it hits 2500 which will come on fast, when it hits you will take off in your power band. Even though i am a big block fan, and like things a little different, you can't go wrong with a 350, they are very strong engine, there are thousands of aftermarket parts out there, they are very good at low rpms decent gas mileage and at top speed very strong, very dependable and easy to make fast. However just like with any engine, you need a decent person doing the work on the engine. With the right setup(engine, torque converter, tranny, and rearend gears, you will make it into the high twelves. Everything has to match in your drivetrain to work right with each other, there is a lot of information out there on camaros with 350's do some research and you will find all the answers. also there are many crate engines, that can save you the trouble of building an engine

[This message has been edited by cody (edited 11-29-2001).]
 
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