68 C-10, You have neither a 283 or 327, you have a 350. I have seen hundreds of these and we call them around here the 010 block. This is the good block for engine building. I also have an 1970 010 block in my 1984 C-10. Hope is is a pleasant surprise, I think it is. C-10'S ROCK with the 010 block.

 

U sure the block number isn't 3970010? Mortec and google didn't have anything for 3971001

If it is 3970010 then all u know is that it has a 4" bore

3970010....302.....69....4...Z-28 Camaro
3970010....327.....69....2...Trucks and industrial
3970010....350...69-80...2 or 4

Depending on the stroke will tell you your displacement. the 350 received a 3.48" stroke, a 327 received a 3.25" stroke, and the 302 got a 3" stroke.

 

interesting

Thanks to both of you.. Yes its the 3970010 I'm typing off my phone.. When I get home ill post the other numbers.. I pulled the motor out because a friend gave me a 327 out of a 68 SS camaro but so far the block numbers don't match anything that I've found either waythanks again.

 

Here is a good site to look at. Get the numbers from the front of the block-pass side just in front of the head. It will be on the deck.
then look here.
http://www.nastyz28.com/chevy-engine-code-stampings.php

I have a 68 C-10 block that is a 327 3970010

 

Thanks to both of you.. Yes its the 3970010 I'm typing off my phone.. When I get home ill post the other numbers

Get the date code from back by the distributor and the suffix from the right front of the block. Those will usually tell you what you need to know- unless someone's swapped the crank in it.

Could be anything from a 302 to a 350 if OEM cranks are used, most anything is possible up to ~400 cid w/aftermarket cranks in the -010 block.

 

Try this site http://www.mortec.com/castnum.htm

They have a great collection of sbc casting numbers.

 

I pulled the motor out because a friend gave me a 327 out of a 68 SS camaro

GM never put a 327 in a 68 SS camaro. If it is a 68 camaro 327 then it is either a 210hp or a 275hp 327.

Jeff

 

new info

Ok contining with the numbers from the motor I thought was a 283 .. First set is 12643265. And f0525ctl. Can anyone finish the pieces to the puzzle ? And for the next one the supposed 327 out of the camaro 3903852 next to distributor on drivers side.. I double checked the numbers so they should be right .. And as far as the SS part goes it sounded fishy I k ow the 327s a good motor but I don't know why itd be in an SS I agree..

 

f0525ctl

CTL 1970 350 4 spd trans. 300 4 Vette
CTL 1972 350 tur hydramatic L65 165 2 A F X
CTL 1975 400 LT4 U 175 4 B A
CTL 1978 305 LG3, a/t U 145 2 B

Built in the Flint Mich factory

But with that casting number, its a 350

 

got to thinking

Ok unless somebody else finds the info on the camaro motor .. I know the block was dirty and if I mistook the 8 for a 3 then it would be a 327 out of a 67. .. Just a thought

 

Ok contining with the numbers from the motor I thought was a 283 .. First set is 12643265. And f0525ctl. Can anyone finish the pieces to the puzzle?

You already know it's a 4" bore block by the casting number being 010. The CTL is:

CTL 1970 350 300 4 4 spd trans.
CTL 1972 350 165 2 tur hydramatic
CTL 1978 305 145 2 LG3, a/t
CTL 1975 400 175 4 LT4

So, the options are for it being a 350 from either 1970 (check for a pilot bearing in the crankshaft- not iron clad that it is a '70 because of this, but evidence), or from 1972. A check of the date code back by the distributor will tell you the year anyway.

And for the next one the supposed 327 out of the camaro 3903852 next to distributor on drivers side.. I double checked the numbers so they should be right

Well, almost right. They're prolly 3903352 (very easy to mistake a 3 for an 8 or vice versa), this is for a 327 from 1967. It will have a small journal forged crank.

 

Ok when I get the next chance ill get to the garage and see if theres any more numbers on the now 350 block lol thanks to all for all your help

 

Ok when I get the next chance ill get to the garage and see if theres any more numbers on the now 350 block lol thanks to all for all your help

Check in the back for a number like "F230" or "D42", that sort of thing- this will be the date code.

 

Sbc Block Casting #'s

SBC BLOCKS

CASTING#.....SIZE...YEAR...MAIN CAP BOLTS....NOTES

140029.....350...80-84...2
330817.....400...72-80...2
355909.....262.....75....2
355909.....305...76-79...2
360851.....262...75-76...2...Monza V-8
361979.....305...77-79...2 or 4, some Canadian assembled heavy duty blocks have 4-bolt main caps
366245.....350...78-79...4...Bowtie
366286...................4...Bowtie, siamesed,
straight nodular iron main
caps, 2-piece seal, 4.00-4.150"
bores, 2.45" main journals
366298...................4...Bowtie, Aluminum, billet main caps, 3.398" bore with sleeves, two piece rear main seal.
366299...................4...Bowtie, Aluminum, nodular
iron splayed caps, wet sump,
4.00" bore
389257.....302.....67....2
393288.....283...65-67...2
460703.....350.....78....4
460776.....305...78-79...2
460777.....305...78-79...2
460778.....305...78-79...2 or 4, some Canadian assembled heavy duty truck blocks have 4-bolt main caps
471511.....267...79-82...2
3556519....283...58-61...2
3703524....265.....55....2...No oil filter
3720991....265...56-57...2
3731548....265...57......2...No side motor mounts
3731548....283...57......2...No side motor mounts
3737739....283...58-64...2
3756519....283...58-62...2
3782870....327...62-67...2
3789817....283...62-64...2
3789817....327...62-67...2
3789935....283...61-64...2
3790721....283...62-64...2...Chevy II recessed oil filter boss
3790721....327...65-66...2...Chevy II recessed oil filter boss
3791362....327...62-67...2...Chevy II recessed oil filter boss
3792563....327.....65....2
3792582....283...64-65...2
3794226....283...58-63...2
3794460....327...62-64...2
3830944....327.....63....2
3834810....283...64-66...2
3834812....283...62-63...2
3837739....283...58-62...2
3849852....283...57-66...2
3849935....283...65-67...2
3858174....327...64-67...2
3858180....327...64-67...2
3858618....350...68-76...2
3862194....283...65-67...2...Chevy II recessed oil filter boss
3862812....283...62-64...2
3892657....302.....67....2...Z-28 Camaro
3892657....327.....67....2
3892657....350.....67....2...Camaro
3896944....283...66-67...2
3896948....283...66-67...2
3903352....327.....67....2
3914636....307.....68....2
3914638....307.....68....2
3914653....307...68-73...2
3914660....327.....68....2
3914678....302.....68....2...Z-28 Camaro
3914678....327.....68....2
3914678....350.....68....2
3931174....307.....68....2...Truck
3932371....307...69-73...2
3932373....307...68-73...2
3932386....302.....69....4...Z-28 Camaro
3932386....327.....69....2
3932386....350.....69....2 or 4
3932388....327.....69....2
3932388....350.....69....2 or 4
3933180....327...68-69...2
3951509....400...70-71...4
3951509....400...74-80...2
3951511....400...70-73...4...Some replacement blocks had 2-bolt main caps
3956618....302.....69....4...Z-28 Camaro
3956618....327...68-69...2
3956618....350.....69....2 or 4
3956632....307.....69....2
3959512....327...62-67...2...Was also used for some "CE" replacement blocks
3959532....283...64......2...Used for some "CE" replacement blocks
3959538....327...........2...Chevy II recessed oil filter boss, Used for some Chevy II "CE" replacement blocks
3970010....302.....69....4...Z-28 Camaro
3970010....327.....69....2...Trucks and industrial
3970010....350...69-80...2 or 4
3970014....350...70-76...2 or 4
3970020....307...69-73...2
3970024....307...69-73...2
4715111....305.....80....2
6259425....350...69-76...2
10036033...350...........4...Goodwrench crate motor, 2-piece rear
seal, "Hecho en Mexico"
10046164...305.....86....2
10049804.................4...Aluminum, Pontiac Super

 

last but not least

Ok the determination of the year.. The last of the numbers on the right of the distributor is.... 3. E. 8. 2 ? If there's supposed to be more let me know other wise there pretty gone .. Thanks to all

 

Ok the determination of the year.. The last of the numbers on the right of the distributor is.... 3. E. 8. 2 ? If there's supposed to be more let me know other wise there pretty gone .. Thanks to all

The last number, "2", means (in your case) 1972. The "E" is May, 8 is the day, so May 8, 1972 is when the block was cast.

From the earlier poking around, you now know the engine was originally a 350 cid, 165 HP, AT-equipped w/a 2-barrel carb.

Good engine to build, in any event.

 

thanks

That's very good to know.. But what makes it a good motor to build? Besides the fact that its a 350 and bigger cubes... My goal for the truck is a street rod that turns. A good number I know the 327 is a little more nostalgic and I could get close to 400 HP fairly easy.... Being that there both good motors would it just be a toss up between the two ?

 

That's very good to know.. But what makes it a good motor to build? Besides the fact that its a 350 and bigger cubes... My goal for the truck

I stopped you there because "truck" is the operative word in this circumstance, IMHO.

Because of the weight involved, to "turn a good number" will require as much TORQUE as possible.

All else being equal, the 350 will out torque the 327. It's really nothing more complicated than that.

 

I stopped you there because "truck" is the operative word in this circumstance, IMHO.

Because of the weight involved, to "turn a good number" will require as much TORQUE as possible.

All else being equal, the 350 will out torque the 327. It's really nothing more complicated than that.

I second this. 327s build power higher in the rpm band due to the shorter stroke. So if you have a heavy vehicle you will need a motor that will put out low rpm torque to get that initial movement from the vehicle. Sure a 327 will work. Will it work well, no but if your dead set on it do it. Were just saying its gonna be a slug. I would consider even a 383 to get as much torque out of it as possible.

 

..

Defininately agree I like being different .. I kinds want to save the 327 for something special like a car anyway .. Its just everybody puts 350s in and Almost everybody and there mother have 383s now .. Illl just have to think about it .. You guys should look up Mr Chevy on youtube.com Its a 55 Chevy and I know its not that light either .. But it is a car tho to .. Anyone know a good stroker motor besides the 383 ?

 

If you want to stick with a sbc. With a 3.75" stroke in a 350 block you can go
Stock bore 377ci
.020" Over 381ci
.030" Over 383ci
.040" Over 385ci
.060" Over 388ci

 

Car Craft (*ugh*) recently did a build up of a SBC 4" bore 4-bolt block that they stuffed a 4" stroke crank into. Comes out to around 408 cid @ 0.030" over. Personally, I wouldn't do it- but the option exists.

You can stroke anything- take a 400 and stuff it w/a 4" crank and get a 427 w/a std. bore.

 

gotta new one

Ok guys I got another one I know its a 358 87-95. But I was hopin to get a little more info on it. The numbers are GM 5.7 lg sgi. ... A249. .... 14093638. ... Thanks in advance ... Just looking for a closer year for parts and what ever else you can find