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02-25-2014, 08:54 AM
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#1 |
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Registered User
Join Date: Jan 2014
Location: Cabot, Arkansas
Posts: 7
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3970010 casting #
I have a 66 c10 and the casting number on the engine block is 3970010. What engine is this?
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02-25-2014, 09:18 AM
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#2 |
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KEEP ON TRUCKIN'
 
Join Date: Jun 2005
Location: Sterling, Va.
Posts: 5,730
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Re: 3970010 casting #
Welcome to the site. Would love to see pics of your truck. Here is a link that might help you out. http://www.thedirtforum.com/castings.htm
__________________
JIM '97 GMC Sierra K1500 '95 Chevy Silverado C1500 '71 Cheyenne Z71 / LT1 & 4-Speed SWB K/10  Father/Son Projecthttp://www.youtube.com/watch?v=4l689JKXPnA http://67-72chevytrucks.com/vboard/payments.php "LIVIN' FREE FOREVER" 
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02-25-2014, 09:55 AM
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#3 |
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Registered User
Join Date: Jan 2014
Location: Cabot, Arkansas
Posts: 7
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Re: 3970010 casting #
Thanks a lot. That was a big help!!!!!
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02-25-2014, 10:20 AM
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#4 |
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KEEP ON TRUCKIN'
Join Date: Jun 2005
Location: Sterling, Va.
Posts: 5,730
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Re: 3970010 casting #
Your welcome!
__________________
JIM '97 GMC Sierra K1500 '95 Chevy Silverado C1500 '71 Cheyenne Z71 / LT1 & 4-Speed SWB K/10 Father/Son Projecthttp://www.youtube.com/watch?v=4l689JKXPnA http://67-72chevytrucks.com/vboard/payments.php "LIVIN' FREE FOREVER"
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02-25-2014, 10:22 AM
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#5 |
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KEEP ON TRUCKIN'
Join Date: Jun 2005
Location: Sterling, Va.
Posts: 5,730
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Re: 3970010 casting #
To find out what that engine was in, try to get the numbers off the pad that is on the front of the block by the passengers side head.
__________________
JIM '97 GMC Sierra K1500 '95 Chevy Silverado C1500 '71 Cheyenne Z71 / LT1 & 4-Speed SWB K/10 Father/Son Projecthttp://www.youtube.com/watch?v=4l689JKXPnA http://67-72chevytrucks.com/vboard/payments.php "LIVIN' FREE FOREVER"
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02-25-2014, 01:02 PM
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#6 |
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Registered User
Join Date: May 2012
Location: Scarborough ME.
Posts: 413
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Re: 3970010 casting #
3970010 is MOST likely a 4 bolt main block. Everyone I have seen was. Supposedly cast in a 2 bolt version also, but I have never seen one.
__________________
1962 Impala SS 383 stroker Tremec TKO 600 Black 1965 SWB BBW Fleetside Custom Cab PB Coilover setup Black 2003 100th Anniversary Road King Classic Silver Black |
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02-26-2014, 12:24 PM
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#7 |
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Registered User
Join Date: Oct 2007
Location: Marietta, GA
Posts: 806
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Re: 3970010 casting #
I have a 3970010 2-bolt block. The 2-bolts are actually pretty common.
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02-26-2014, 06:10 PM
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#8 |
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Senior Member
Join Date: Apr 2009
Location: SAN FERNANDO VALLE SOL CAL
Posts: 1,064
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Re: 3970010 casting #
Common 350 4or 2 Bolt Used. From 70s Cars and Trucks Lots Of Them Out There
__________________
1966 GMC K25 V6 351E Original Utility Truck 2000 C3500 Hot Rod Utility Truck 2003 ROAD KING 100th 124ci 6 Speed 145CI M/P Pro Street FXR 2002 FXDP 2007 2500HD DURAMAX. DD Studio Teamsters / Mechanic Retired GM Master Tech 20 Years Retired Ford Tech 15 Years |
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02-26-2014, 06:53 PM
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#9 |
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Registered User
Join Date: Sep 2009
Location: California Delta
Posts: 2,163
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Re: 3970010 casting #
This is what I come up with for 3970010.
3970010 = 302, 4 bolt, 1969 3970010 = 327, 2 bolt, 1969 3970010 = 350, 2 or 4 bolt, 1969-1980 So good chance it's a 350 but you'll need more investigation for a true answer.
__________________
Name: Rich Current Ride: 1964 C-10 Short Fleetside Daily Driver: 2005 GMC crew cab short fleetside /2001 Chevy Tahoe Past GM Trucks: 1959 GMC short stepside 1968 GMC short stepside-4x4 1973 Chevy short stepside 1989 Chevy short fleetside-reg cab 1993 Chevy short fleetside-Xcab 2002 Chevy short fleetside-Xcab Save the dinosaurs, use synthetic oil. |
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03-20-2014, 10:10 AM
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#10 |
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Registered User
Join Date: Jan 2014
Location: Cabot, Arkansas
Posts: 7
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Re: 3970010 casting #
Well I have got the engine on a stand and took off the oil pan. 2 bolt main and a 3.25 stroke. So it looks like a 327!!!! Thanks for all the help!!
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