help ID this block - The 1947 - Present Chevrolet & GMC Truck Message Board Network

*b-rad* · 02-19-2009, 06:18 PM

3970010 i thought it was a 350 but it is not

69halfton · 02-19-2009, 06:35 PM

i have a 1969-1980 350 2 or four bolt main unsure.

its one if those "high nickle content" block

...i dont know if that means anything to you, they are apparently a tougher block...

*b-rad* · 02-19-2009, 06:57 PM

so how do u tell if it is a 350 or a 307 why i ask is i went to get a starter for it and the one on the truck was for a 307 but when i rebuilt the eng i used 350 parts. so will a 307 starter work on a 350

DB Smith · 02-19-2009, 06:59 PM

Mine's a 0010 too. It was originallly a 327. Some of the very first (68 - 69) large journal 4 bolts had 327 rotating assemblies. The deck height's the same (9.25 I think??) I had it bored .030 over and used a 350 crank and pistons with the 5.7 rods to make a 355. A 383 build is doable too !!

The starters for automatics and manuals bolt up differently. Otherwise, You should find they interchange. The starter I'm running came off my original 6 cyl. The bell housing and starter are the same on both.

100%Chevy · 02-19-2009, 10:06 PM

That's just the casting number-fits hundreds of applications.
The good numbers are on the block surface just ahead of the right side head.If it hasn't been decked!
It tells what you need to know.
Mike.

monte0185 · 02-19-2009, 10:26 PM

It can be a 302 or 327 or 350. All have the same bore just different stroked cranks. You can use a 350 crank and the starter depends more on the flywheel size then the engine size. Hope this helps.

*b-rad* · 02-19-2009, 10:29 PM

cool monte0185 that is what i need to hear lol

*b-rad* · 02-19-2009, 10:32 PM

Quote:

Originally Posted by 100%Chevy

That's just the casting number-fits hundreds of applications.
The good numbers are on the block surface just ahead of the right side head.If it hasn't been decked!
It tells what you need to know.
Mike.

here are those numbers 13s190897

67_C-30 · 02-19-2009, 10:35 PM

Most blocks have 3 starters holes on the bottom and will accept the diagonal and straight across mount starters, some blocks only have the 2 holes for the diagonal pattern. I discovered this while trying to bolt a mini starter on a 3970010 block years ago and it didn't have the hole drilled for the straight across pattern that my mini starter needed. I had to drill and tap the block to bolt my starter on. This may be your issue.

As monte0185 said, a 3970010 block is definitely not a 307. It is a 4" bore block and they came as 302, 327, and 350 from the factory.

Skirkpat · 02-19-2009, 10:38 PM

Quote:

Originally Posted by b-rad

3970010 i thought it was a 350 but it is not

It is the most common 350/327 casting

*b-rad* · 02-19-2009, 10:46 PM

thanks guys i see the three holes for the starter now

72chevyfleet · 02-19-2009, 11:00 PM

ive got the same one and its a 350 four bolt main 3970010

Ram-Man · 02-19-2009, 11:44 PM

Quote:

Originally Posted by Skirkpat

It is the most common 350/327 casting

The last 3 random sb I got were that same casting #.

02-19-2009, 06:18 PM	#1
b-rad Account Suspended Join Date: Nov 2007 Location: FT STEWART GA Posts: 509	help ID this block 3970010 i thought it was a 350 but it is not

02-19-2009, 06:35 PM	#2
69halfton Registered User Join Date: Apr 2007 Location: King City, Ontario, Canada Posts: 974	Re: help ID this block i have a 1969-1980 350 2 or four bolt main unsure. its one if those "high nickle content" block ...i dont know if that means anything to you, they are apparently a tougher block... __________________ - Jason If you can turn, Youre not going fast enough. Favorite caption: first car to 200 mph in the 1/4 mile, no parachute, drum brakes all the way around.. ..back when men were men.

02-19-2009, 06:57 PM	#3
b-rad Account Suspended Join Date: Nov 2007 Location: FT STEWART GA Posts: 509	Re: help ID this block so how do u tell if it is a 350 or a 307 why i ask is i went to get a starter for it and the one on the truck was for a 307 but when i rebuilt the eng i used 350 parts. so will a 307 starter work on a 350 Last edited by b-rad; 02-19-2009 at 07:11 PM.

02-19-2009, 06:59 PM	#4
DB Smith Old Shovel Rider Join Date: Oct 2007 Location: Rain City, WA. Posts: 117	Re: help ID this block Mine's a 0010 too. It was originallly a 327. Some of the very first (68 - 69) large journal 4 bolts had 327 rotating assemblies. The deck height's the same (9.25 I think??) I had it bored .030 over and used a 350 crank and pistons with the 5.7 rods to make a 355. A 383 build is doable too !! The starters for automatics and manuals bolt up differently. Otherwise, You should find they interchange. The starter I'm running came off my original 6 cyl. The bell housing and starter are the same on both. __________________ Daryl.... *'68 C/10 Stepside* *2007 Build Page* *DS Originals* *Old Bikers.US* Last edited by DB Smith; 02-19-2009 at 07:19 PM.

02-19-2009, 10:06 PM	#5
100%Chevy Registered User Join Date: Jun 2008 Location: Moss Point,Ms. Posts: 1,439	Re: help ID this block That's just the casting number-fits hundreds of applications. The good numbers are on the block surface just ahead of the right side head.If it hasn't been decked! It tells what you need to know. Mike.

02-19-2009, 10:26 PM	#6
monte0185 Registered User Join Date: Oct 2008 Location: Brighton, TN Posts: 1,267	Re: help ID this block It can be a 302 or 327 or 350. All have the same bore just different stroked cranks. You can use a 350 crank and the starter depends more on the flywheel size then the engine size. Hope this helps. __________________ A computer once beat me at chess, but it was no match for me at kick boxing. Duct tape is like the force. It has a light side, a dark side, and it holds the world together.

02-19-2009, 10:29 PM	#7
b-rad Account Suspended Join Date: Nov 2007 Location: FT STEWART GA Posts: 509	Re: help ID this block cool monte0185 that is what i need to hear lol

02-19-2009, 10:35 PM	#9
67_C-30 I have a radical idea! Join Date: Jan 2005 Location: Sweet Home Alabama! Posts: 6,513	Re: help ID this block Most blocks have 3 starters holes on the bottom and will accept the diagonal and straight across mount starters, some blocks only have the 2 holes for the diagonal pattern. I discovered this while trying to bolt a mini starter on a 3970010 block years ago and it didn't have the hole drilled for the straight across pattern that my mini starter needed. I had to drill and tap the block to bolt my starter on. This may be your issue. As monte0185 said, a 3970010 block is definitely not a 307. It is a 4" bore block and they came as 302, 327, and 350 from the factory. __________________ '67 C-30 Dually Pickup 6.2 Turbo Diesel, NP435 ‘72 C-10 SWB , 350 4bbl, TH350 '69 C-10 SWB , 250 L6, 3 OTT '69 GMC C3500, dump truck, 351 V6, NP435 '84 M1009 CUCV Military Blazer 67 C-30 Turbodiesel build thread http://67-72chevytrucks.com/vboard/s...d.php?t=254096 My trucks http://s226.photobucket.com/albums/d...ediafilter=all Member of the 1-Ton Club!

02-19-2009, 10:46 PM	#11
b-rad Account Suspended Join Date: Nov 2007 Location: FT STEWART GA Posts: 509	Re: help ID this block thanks guys i see the three holes for the starter now

02-19-2009, 11:00 PM	#12
72chevyfleet Learning As I Go Join Date: Feb 2009 Location: scotts valley california Posts: 250	Re: help ID this block ive got the same one and its a 350 four bolt main 3970010 __________________ 1972 Chevy C-20 Longbed 2wd Granny Low with a Crate 350: Air Gap Manifold, Edelbrock 600cfm, HEI, Headers to a 40 series flow (soon to be dual again)

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