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Old 12-05-2018, 08:16 PM
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Sb Chevy engine number decoding

I have a sb 350 and was wondering if anyone could help me figure out what year it is I have found numbers stamped on front of engine on deck plate V05021YZ0 and on the head between the valves are 333882 on back of block is 3970010 any help please?

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Old 12-05-2018, 09:17 PM
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Quote:
Originally Posted by Jeftin-01 View Post
I have a sb 350 and was wondering if anyone could help me figure out what year it is I have found numbers stamped on front of engine on deck plate V05021YZ0 and on the head between the valves are 333882 on back of block is 3970010 any help please?
3970010, 350, '69-'80, 2 or 4-bolt main caps.
YZO is not a good letter combo. Clean the paint out of the letters and try again. There are no 3-letter codes that begin with Y.
333882.....74-80...350/400......76cc chambers
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Old 12-06-2018, 09:09 PM
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Sb Chevy engine number decoding

I have a 350 and trying to figure out the year of it on the deck plate numbers are C5F162038 can anyone help please?
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Old 12-06-2018, 09:19 PM
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Quote:
Originally Posted by Jeftin-01 View Post
I have a 350 and trying to figure out the year of it on the deck plate numbers are C5F162038 can anyone help please?
If that number came off the passenger side of the motor close to the top water pump bolt head, then it is likely a partial V.I.N. See if there are not additional alpha-numeric stampings in the same general area on the deck.
The block casting number is at the driver's side rear of the block, on a ledge just before where the bellhousing bolts to the block. The number may be hidden by oil and debris. If the motor has heads with it, the head casting number can be found in between the valves under the valve cover.
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Old 12-06-2018, 09:34 PM
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I found 2 sets of numbers on the deck plate and don't know what one to go by first set is C5F162038 and the second set is V05021YZ0
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Old 12-06-2018, 09:44 PM
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Originally Posted by Jeftin-01 View Post
I found 2 sets of numbers on the deck plate and don't know what one to go by first set is C5F162038 and the second set is V05021YZ0
The C number is a partial V.I.N. of the car the motor was installed in at the factory. The V05021 number tells us that the motor was produced in Flint, Michigan on the 21st of May in the year of production. I think you asked about the YZO the other day. I looked it up for you and told you that there is no YZO. Go back to the block and go over the letters with an ice pick to remove all paint so you can read them.
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Old 12-07-2018, 06:38 AM
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And when you get the pad all cleaned up take a pic and post it here.
A pic will help immensely.
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Old 12-08-2018, 10:35 AM
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Here are the V05 numbers
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Old 12-08-2018, 11:00 AM
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Most all of the online Code Number lists are still slightly incomplete, so it isn't unheard of to not be able to trace a code.

Seems to happen more often with Canadian engines.

There is an alpha-numeric date code cast onto the rear flange, on the same side as the casting number side.

Is there some super important reason you need to know the year??....most all of the "010" casting blocks are the same basic engine, smogger open chamber heads, plain cast pistons, cast crank. Hp numbers basically from 165 to 260 or so .

The "C5F" number string is "C"=Chevrolet, "5" = year ending in 5....so with an 3970010 block being '68-80 years of use, it is an 1975 Engine. "F" = Flint Engine plant.

The 333882 head castings are among the top three WORST ever produced for the SBC. Very thin, crack prone castings.

Last edited by ericnova72; 12-08-2018 at 11:10 AM.
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Old 12-08-2018, 12:19 PM
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May have found the last number to this puzzle? But seems to be V05021YZ6 I hope those are correct numbers.. really just want to know the year and vehicle it came out of it's going in a 72 c10 super chyanne and just want to no what I put in there to keep up with the history of truck from here on and I really appreciate you guy's helping me and others out
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Old 12-08-2018, 01:19 PM
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The lists I've looked at all stop at "YX", no YZ codes for small blocks, just big blocks which isn't what you've got.

Could be a code that nobody has yet verified and submitted to any list, or it could just be an employee miss-stamping it. No way to correct a miss-stamp, other than to change the one wrong letter in the gang stamp before you stamp the next 20 engines coming down the line LOL.

The VIN coding stamped in verifies it as a 1975 engine, smack dab in the middle of the most smogged out low power emissions 350 engines, so a 175-190 Hp guess would be an easy one to make. Could be 2 or 4 bolt mains, but almost certainly cast crank, dish pistons, stone stock .390/.410" lift cam and those rotten 882 heads. Block is good for a hot rod/performance rebuild, and crank and rods could be refurbished if you wanted to do a rebuild, but everything else in it is a trash can item, nothing worth rebuilding as far as heads or pistons go.
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Old 12-08-2018, 01:32 PM
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It is a 4 bolt main with 882 head's on it I know nothing about those type head's but thanks for verifying the year for me so I have a 1975 low compression engine I guess any ideas on what to do with beefing it up just a little?and thanks again people for the help
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Old 12-08-2018, 02:52 PM
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Best thing you can do is buy a better set of heads, then maybe the usual suspects like a small cam upgrade, aluminum intake, 4 barrel, headers, dual exhaust.
Better heads will have a smaller combustion chamber to raise the low 8.0-8.5:1 stock compression up to the 9.2-9.5:1 range, and have a lot better airflow too.

Look for an aftermarket Vortec style replacement head, like Promaxx iron or EngineQuest iron, or you could look to aluminum budget heads if you wanted....certainly don't waste a dime on anything for the current heads - no rebuild, no new seals, northing. Spending money on them would by like flushing it down the toilet.
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Old 12-10-2018, 07:13 AM
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I used a similar engine to build my 355 up. The only original parts retained were the block, the crank and crank bolt. Everything else was replaced, I went long on this one. The engine decoded as a '74 police car 350 with a 4-barrel. It had a 2-barrel on it when I got it.
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