Engine block number question/Help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Tabone777 · 12-01-2011, 02:55 PM

I need a lil help please. I got the engine block number and looked it up. It comes back to two different size engines. A 327 and a 350. So other than pulling a head off and measuring how can I tell what engine I actually have? Block #3970010.

mrein3 · 12-01-2011, 03:05 PM

Quote:

Originally Posted by Tabone777

I need a lil help please. I got the engine block number and looked it up. It comes back to two different size engines. A 327 and a 350. So other than pulling a head off and measuring how can I tell what engine I actually have? Block #3970010.

I have both a 2-bolt main and 4-bolt main 350 with that block number.
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**too much stuff** · 12-01-2011, 03:21 PM

You need the suffix code off the front also, and a date code off the rear may help also.

Lee H · 12-01-2011, 03:21 PM

The only way to tell what you have (as born) is to get all three numbers, the casting number, date code, and stamping numbers from front pad. With that you can tell make, model, HP rating, trans type, and maybe other stuff like carb, emission equip, etc.

**RenoKeene** · 12-01-2011, 03:26 PM

Yep, it's a 350. Here is a link
http://www.nastyz28.com/chevy-engine-code-stampings.php
If you have the numbers off of the front passanger side of the block you can decode it some more, along with the head casting numbers, intake, etc.
It's all on nastyZ28's site.

**RenoKeene** · 12-01-2011, 03:27 PM

Man...you guys are fast typers!

chevytruckluver · 12-01-2011, 03:27 PM

look at the locations in the pic. IIRC the 327 and the 350 are the same bore size the only diffrence is stroke (crankshaft) so pulling head would not tell you anything more. Both great engines by the way

Tabone777 · 12-01-2011, 03:46 PM

Thanks guys. Everyone here is such a big help...

Lee H · 12-01-2011, 08:15 PM

Welcome to the board by the way.

12-01-2011, 02:55 PM	#1
Tabone777 Registered User Join Date: Nov 2011 Location: San Angelo Texas Posts: 15	Engine block number question/Help I need a lil help please. I got the engine block number and looked it up. It comes back to two different size engines. A 327 and a 350. So other than pulling a head off and measuring how can I tell what engine I actually have? Block #3970010.

12-01-2011, 03:21 PM	#4
Lee H Registered User Join Date: Jun 2010 Location: Upland Ca Posts: 4,142	Re: Engine block number question/Help The only way to tell what you have (as born) is to get all three numbers, the casting number, date code, and stamping numbers from front pad. With that you can tell make, model, HP rating, trans type, and maybe other stuff like carb, emission equip, etc. __________________ 1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703

12-01-2011, 03:26 PM	#5
RenoKeene Florida Edition Join Date: Oct 2010 Location: Fruitland Park, FL Posts: 4,022	Re: Engine block number question/Help Yep, it's a 350. Here is a link http://www.nastyz28.com/chevy-engine-code-stampings.php If you have the numbers off of the front passanger side of the block you can decode it some more, along with the head casting numbers, intake, etc. It's all on nastyZ28's site. __________________ 70 GMC Short Stepside "Rose"-An American Beauty: Factory 402/TH400, AM/FM, AC, Tilt, Tach, Buckets, Posi, PS, PB, 3-5 Drop, Complete Resto-Rod 67 C-20 Slant Back Wrecker "Mad Max" 67 C-10 Ratrod "Step-N-Wolf" 71 Serro Scotty Sportsman camper "Scotty" 97 LT1 Z28 "The Hornet" Link to more pics of "Rose" http://67-72chevytrucks.com/vboard/a...p?albumid=1684 Check out my "Cheap Tricks" thread and add to it if you can, lots of good info there. http://67-72chevytrucks.com/vboard/s...d.php?t=489394

12-01-2011, 03:27 PM	#6
RenoKeene Florida Edition Join Date: Oct 2010 Location: Fruitland Park, FL Posts: 4,022	Re: Engine block number question/Help Man...you guys are fast typers! __________________ 70 GMC Short Stepside "Rose"-An American Beauty: Factory 402/TH400, AM/FM, AC, Tilt, Tach, Buckets, Posi, PS, PB, 3-5 Drop, Complete Resto-Rod 67 C-20 Slant Back Wrecker "Mad Max" 67 C-10 Ratrod "Step-N-Wolf" 71 Serro Scotty Sportsman camper "Scotty" 97 LT1 Z28 "The Hornet" Link to more pics of "Rose" http://67-72chevytrucks.com/vboard/a...p?albumid=1684 Check out my "Cheap Tricks" thread and add to it if you can, lots of good info there. http://67-72chevytrucks.com/vboard/s...d.php?t=489394

12-01-2011, 03:27 PM	#7
chevytruckluver Eat, Sleep, Drive a Chevy Join Date: Apr 2010 Location: the town of the cow, Texas Posts: 1,152	Re: Engine block number question/Help look at the locations in the pic. IIRC the 327 and the 350 are the same bore size the only diffrence is stroke (crankshaft) so pulling head would not tell you anything more. Both great engines by the way Attached Images __________________ Trey Silence may be Golden, but Duct Tape is Silver! 72 Short Step 57 "big window" short step

12-01-2011, 03:21 PM	#3
too much stuff Roadtrip! Join Date: Feb 2003 Location: Grand Rapids MN Posts: 13,715	Re: Engine block number question/Help You need the suffix code off the front also, and a date code off the rear may help also. __________________ 67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto

12-01-2011, 03:46 PM	#8
Tabone777 Registered User Join Date: Nov 2011 Location: San Angelo Texas Posts: 15	Re: Engine block number question/Help Thanks guys. Everyone here is such a big help...

12-01-2011, 08:15 PM	#9
Lee H Registered User Join Date: Jun 2010 Location: Upland Ca Posts: 4,142	Re: Engine block number question/Help Welcome to the board by the way. __________________ 1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703



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