how to idenify a chevy motor?????

[FoxRacing440]

i got a 83 chevy and i bought it from my uncle and he said it either has a 327 or a 350 he wasn't sure. he traded a railbuggy for it.so any one know? V8

[433rd]

The block its the same, the crank and pistons are different.

The only way to really tell is have it pumped or tear it down.

[JOEX]

Is it the original motor?
Was the 327 even made in '83?

Joe

[FoxRacing440]

I dont know if its the origional motor or not. What ever thats in it runs pretty good i got 36. 14.50" gumbo mudders on it and it will cherp them for a second. it's got the edelbrock carb and manifold and stuff on it. Its auto. right now but i want to change it over to 4 speed bulldog.

[TravEX]

is it the stock motor?, if so it's prolly a 305 or 350,,

is it SWB? LWB? 1/2 ton?

[deezie]

i would say its the 350..... i highly doupt a 305 would roll those tires in a truck like that.... take it to a chevy buff, they'll tell ya..

[Quad18star]

Only way to check it out , without tearing it down is to get the numbers that are stamped on it and look it up on the net or in books . The numbers on the block will tell you when the motor was produced , where it was produced , and what size it is . Prolly came right off the Detroit assembly line or maybe in Windsor Ontario Canada.

[JustRace]

Originally posted by Quad18star
Only way to check it out , without tearing it down is to get the numbers that are stamped on it and look it up on the net or in books . The numbers on the block will tell you when the motor was produced , where it was produced , and what size it is . Prolly came right off the Detroit assembly line or maybe in Windsor Ontario Canada.


Exactly, run the casting numbers.

[433rd]

Originally posted by JustRace



Exactly, run the casting numbers.

Still wont tell for sure. You can take any 350 or 327 block and turn it into the other. They are both 4.00" bore blocks. I've done the conversion many times. Once a block is stripped, you could build either out of the same exact block.

Unless.... it is a very early 327 "small journal" block. The only way you could do the conversion is ti turn the mains on a 350 crank down. Then you could tell by casting numbers, most likely it is not.. The early blocks are pretty well sought after by the muscle car guys and don't turn up very often thse days.

Once again, two real options, "pump" it or tear it down if you want to know for sure.

[433rd]

Originally posted by JOEX
Is it the original motor?
Was the 327 even made in '83?

Joe

Nope, the "original" 327's went out when the 350 was introduced in the very early 1970's. (actually, I think the last year for the 327 was 1968, I would have to think a little harder to be sure but it was right at that time frame anyway)

[MSL]

they didnt put 327 in chevy trucks(just assuming its a truck) in 83

[Guy400]

They're right in saying the only way you're going to be able to tell what displacement it really is is to tear it down or measure the cylinders. As far as casting numbers on the block, there seems to be many rumors about these. I can tell you this- my 350 that I had in my S-10 was a 2-bolt main 350 block out of a '71 Chevelle with a casting number of "010" on it. My current 4-bolt main 350 block out of a '72 Vette is cast as an "010" block. My grandmother's all original '68 Vette 327 is cast as an "010".

[433rd]

You're right, the "010" blocks came in 2 and 4 bolt main 350's and 2 bolt main 327's. It is one of the most common casting numbers of the small blocks, yet is generally a semi desirable block due to the high nickel content in the casting alloy.

[motochris]

If you have the casting number i can check it for you and see whats up... The 327 was a better motor than the 350 but gave up a little torque at low end.But at mid to top end it would beat the 350... They stopped using the 327 actualy in1970 even tho there were still a few out there being used... There were options back then.........:D

[FoxRacing440]

it's a S/wb 1/2 ton. Where are the numbers located at on the block i can't find them. What ever it is it's supposed to be bored 0.30 over....

[433rd]

Originally posted by FoxRacing440
it's a S/wb 1/2 ton. Where are the numbers located at on the block i can't find them. What ever it is it's supposed to be bored 0.30 over....

The casting numbers on the block are located on a "flat" casting area behind the head right in front of where the tanny bolts up. It may take a little looking but it's there. Might have to scrape some "goo" off if it's dirty to see it.

[FoxRacing440]

Will i have to get under the truck to see it? If it has a 350 in it i want to build it so it will scream any ideas the best set up. i'm going to use for 4 wheeling alot but still want to drive it every day.:D :D

[RideRed04]

Kinda funny how they dropped the 350 and went back to the 327 on the new silvarados....lol

[Bean]

yea, Chevy hasnt had the 327 out for a long time, now its back, i believe the reason they replaced the 350 with the newer 327, is that the new Silverado's are lighter, and the 327 has better gas mileage, and the 327 is higher tech, so there is no need for a 350 in that truck

[Guy400]

The new 327 in the Silverado's has almost nothing in common with the late-60's 327. The newer 327 uses a smaller bore but longer stroke therefore it develops better torque in the lower RPM's. The late-60's 327 used a 4" bore and 3.25" stroke. This made it a much better revver.

[TravEX]

actually to be technical, under the hood of the new 5.3's is says 325ci, and your are exactly right, they have NOTHING in common with the old 327's,,,i get so annoyed when these teenagers around here brag that their new Silverado or Sierra "Yeah, it's got the 327 in it, they brought it back." AAARRRRGGGGGGGHHHHHHH!!!

hehe

later

[crazybuffalo]

The block its the same, the crank and pistons are different.
actually the pistons are the same its just the crank. its the same principal as a 427 and a 454.

[Moded86R]

Yes the 327 wasn't produced after 68.I have a 67 chevy truck that came with a 327.


These guys are right listen to them.Run the casting #'s.Do a search on yahoo and you will get tons of results.Just put something like "small block chevy casting #'s."

With large tires torque is key.If you can afford it and really want some good power.Build a 383.It is a 350 bored .030 over.With a 400 crank turned down to fit the 350 main journals.(or you can get an aftermarket crank with the right size journals already.)



One thing to note.When building a 383 clearancing the block is ussually needed.And a small base circle cam for cam to rod clearance is also needed.


Of course special pistons are needed.(easily available through places like summit or jegs.

With large displacement small blocks good heads are key.That is one of the reason's big blocks make more power.Most big block heads produce very good flow #'s.Most of the time as good as if not better than ported and aftermarket small block heads.

The later model vortec heads.(found on 96 and later small blocks)are very good heads.With a little work.The right cam and few other things a 500 horse 383 with enough torque to easily melt those big tires can be built for a reasonable price.


Hope I helped out a little bit.

[Moded86R]

Here is a pic to give you a little better idea where the #'s are located.


On the driver side of the block.Just in front of where the trans bellhousing bolts up.


This is a 79 350 4 bolt main.Standard bore.Little no no ring ridge.Don't know if I wanna tear it down and build a 383.Or just build it up like it is.

I am trying to figure out how to get my 67 chevy truck to run 12's n/a in street trim.(on the cheap)

I circled the #'s

[DJC]

yall are talking about 010 casting on the side of the block has nothing to do with what he is asking look on the front of your motor top left or right above water pump for a protrusion in the block with flat top to it or look at the back top or side back next to the trannie for a flatt spot clean either of these places depending on year where it will be at and there will be you numbers 327 casting numbers 3959512 3956618 3932386 3914678 3914660 3903352 3892657 3858180 3858174 3830944 3814660 3794460 3792563 3791362 3790721 3789817 3782870:devil: :D

[DJC]

do you want 350 numbers? then go to www.fastnuf.com/sbccastingnumbers.html

[MotoX3]

Uhhh..guys,this threads from '03:ermm:

[JOEX]

Now I understand what that PM was about:p