Can You I D a Block & Heads Small Block Chevy please? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 02-27-2007, 07:48 PM
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Can You I D a Block & Heads Small Block Chevy please?

I would like to make sure this a Chevy Small Block 400 Because of the external Balancing thing.

Please look @ these pictures.

Thanks for your time!


R


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Old 02-27-2007, 07:55 PM
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yeah that's a 400 block for sure, don't know about the heads though-I thought them castings were 350 only.
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Old 02-27-2007, 08:16 PM
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I was never able to remember all those different shapes on the front of the heads maybe this will help too??

See the little silver right angle triangles???

Thanks!!!



R
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Old 02-27-2007, 09:04 PM
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According to Moretech's site- http://www.vehicleidentificationnumb...e_numbers.html

those heads are right for a 400. From what I've seen the 882's were the most common.

Does the engine have three feezeplugs on each side or two?
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Old 02-27-2007, 09:25 PM
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Hey Rob,

Did you get that PS pump mounted up yet?
Let's see some pictures when you do.

Don
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Old 02-27-2007, 10:08 PM
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Quote:
Originally Posted by badbob
According to Moretech's site- http://www.vehicleidentificationnumb...e_numbers.html

those heads are right for a 400. From what I've seen the 882's were the most common.

Does the engine have three feezeplugs on each side or two?

Its got 2 on the front sides & back & the one on the cam shaft in the rear

No not yet I got side tracked by a little rust hole in the fire wall..................

Dammit it got bigger & bigger each time I hit it with my pick hammer trying to scale off the rust .

Next think you know I'm back at the Bone Yard getting a "floor section,''It IS a tricky spot I should be Welding tomorrow weather permitting.

I keep taking chit off I thought I was just installing a MOTOR not Restoring the thing.

My brain gets so fogged up @ least all those years working tuned my "spidy senses " to not cut stuff up until I got it all worked out in my teeny tiny brain box.

LOL

Oh well @ least it will be done right.

Are the 882 heads good bad or indifferent ?

badbob Thanks for the link!


R
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Old 02-28-2007, 11:18 AM
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Hey Guys ,

What is the deal with the "replacement blocks in 70 ~ 73?


What is the difference between the 2 & 3 freeze plug block.


Thanks,

R
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Old 02-28-2007, 12:54 PM
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Three freeze plugs usually identified a 4 bolt main block but I've seen some with only two bolts.
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Old 02-28-2007, 12:55 PM
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I think that Ford Blue is going to fry off those exhaust manifolds fairly fast, have a fire extinguisher handy.
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Old 02-28-2007, 01:19 PM
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that 509 is 90% sure to be a 2 bolt, and the year is most likely going to be 78-80 because that electric oil sender unit usually wasnt on anything before 78

i have the original 509 casting 400sb in my 77 k-10 still

TLS stamping suffix code

2 bolt

runs great

also 882 heads in which was what most all the 400 engine got for heads


they are somewhat ok but some were thin casting and they flow decent but nothing spectacular

are just regular open chamber smogger heads

50/50 chance that they are thin wall and could crack or warp

good luck
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Old 02-28-2007, 02:51 PM
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Those 624 heads are very, very light castings and excellent doorstops! You will find any number of different casting numbers that Chevy used on the 400. 882s were probably used mostly in the latter years of 400 production. They are also light castings, but better than the 624s. You can use any Chevy head of that era by having steams holes drilled in them. I've got a set of Vortecs on the 406 in my '86.
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Old 02-28-2007, 08:06 PM
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Quote:
Originally Posted by Rob Keller
Hey Guys ,

What is the deal with the "replacement blocks in 70 ~ 73?


R
Ha look I am quoting my self

I had seen in the Mortec site that there was a replacement block listing.
I am guessing that G M redesigned something after 73?

I was talking to BUGS & he has 2 400's & the are 4 bolt 3 freeze plugs & there is no I D shelf on his blocks {the Passenger side front under the alternator}

He's Convinced that its a 350 but every place I looked up it comes up 400

Well any way

Thanks Y'all!!!

Big help

I hope the thing runs , should find out if the weather hold out It should do until I find a big block.


Thanks Again!!!


R
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Old 03-02-2007, 03:03 PM
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Well I can't be 100% sure Rob on it being a 350, I am just going by what I have and all the trips to the bone yard with other small block chevy nuts and that is what they go for first is the 3 freeze plugs on each side, maybe you got real lucky and someone slid a small block 302 chevy in on ya wouldn't that be a hoot???
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Old 03-02-2007, 03:23 PM
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It appears to be a 305/350 crankshaft.

http://www.carcraft.com/techfaq/116_...de/index1.html

Block number crosses to 400, 70-75

It might be a 377 someone put together.

Last edited by xntrik; 03-02-2007 at 03:40 PM.
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Old 03-02-2007, 03:49 PM
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Rob, it was once pointed out to me that the 400s have a very gentle "bulge" on the outside of the block around each of the cylinders. I did not believe it until I checked it out on mine (511 casting) and, sure enough, they were there. I compared that with a 350 and the sides of the block were flat.

xntrik, what crankshaft pictures are you looking at?
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