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12-09-2017, 04:15 PM
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#1 |
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Registered User
Join Date: Oct 2012
Location: mountain view arkansas
Posts: 1,299
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350 block number
On the rear drivers side behind the head the number reads 3970 10. I cant find this number anywhere. It looks like between the 0 and 1 there is some numbers missing. I have cleaned the block good and that is how it reads.
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12-09-2017, 04:25 PM
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#2 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,510
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Re: 350 block number
You’re missing the zero.
The 3970010 block is a common 350 block. |
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12-09-2017, 06:06 PM
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#3 | ||||
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"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,921
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Re: 350 block number
THE most common 4" bore block GM ever made.
Gary
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'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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12-09-2017, 10:15 PM
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#4 |
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Registered User
Join Date: Oct 2012
Location: mountain view arkansas
Posts: 1,299
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Re: 350 block number
Was it common to leave out the 0 and have a space between 3979 10
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12-09-2017, 10:38 PM
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#5 | |
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Active Member
 
Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: 350 block number
Quote:
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68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive... |
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12-10-2017, 08:51 AM
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#6 |
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Registered User
Join Date: Apr 2011
Location: Klein Texas
Posts: 3,852
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Re: 350 block number
Yep. Because it was made in a sand mold. Even with a hardening agent to hold the sand together the small numbers sometimes get obliterated.
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My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe |
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12-10-2017, 10:25 AM
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#7 |
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Registered User
Join Date: Oct 2012
Location: mountain view arkansas
Posts: 1,299
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Re: 350 block number
Ok that is what I wanted to know. Just making sure I did not have some rare block.
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12-10-2017, 02:28 PM
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#8 |
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Registered User
Join Date: Mar 2013
Location: Campbellsville, KY
Posts: 888
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Re: 350 block number
Nope. Good block, but not rare. Commonly referred to as an "oh one oh".
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Alex V. ------ 1967 C10 Suburban, 350/NP435, Green/Green, PS, PB, HD cooling, charging, shocks, and springs. 1985 GMC C3500 SRW, Sierra Classic, 454/TH400, white/blue. |
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12-10-2017, 06:56 PM
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#9 |
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Registered User
Join Date: Oct 2012
Location: mountain view arkansas
Posts: 1,299
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Re: 350 block number
Ok did some checking today and number seven cylinder has a lot of taper. I checked the top with the ring installed and there was about 55 thousandth between the ring gap and at the bottom the gap was about 35 thousandth. This appears to be the worst cylinder as the other on I check was not that bad. How do the wrist pins install in the pistons. Are they heated and pressed or is there a snap ring? The engine is a 1970
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12-10-2017, 09:20 PM
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#10 |
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Senior Member
Join Date: Jan 2011
Location: Hayes Va
Posts: 4,569
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Re: 350 block number
Pressed in.
Jimmy
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60 to 66 Chevy and GMC window decals http://67-72chevytrucks.com/vboard/s...d.php?t=661131 Good friends, good food and a hotrod what else do you need? 1966 BBW long fleet Daily driver 1965 BBW short fleet Sold and going to a good home 1965 Suburban 2003 3500 Duramax 2005 Ultra Classic |
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12-11-2017, 08:20 PM
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#11 | |
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Active Member
Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: 350 block number
Quote:
Local machine shop told me they would press the wrist pins in the new pistons for about $7 each.
__________________
68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive... |
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