3970010 block , could be L48?
Thread Starter
Cruising
Joined: Aug 2013
Posts: 10
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3970010 block , could be L48?
Hi, it's me again. I finnaly got my hands on the car(C3 1978).
I was trying to find out, if I still have factory block, but I couldn't find
engine plate ( it's supposed to be in front of the engine passanger side).
I guess it's no longer there.
Only thing I found, it was block number 3970010.
I was wondering if it's a crate engine(I wouldn't be suprised), or L48 could go with this number. BTW whole block is red, not blue as it was painted in factory.
I was trying to find out, if I still have factory block, but I couldn't find
engine plate ( it's supposed to be in front of the engine passanger side).
I guess it's no longer there.
Only thing I found, it was block number 3970010.
I was wondering if it's a crate engine(I wouldn't be suprised), or L48 could go with this number. BTW whole block is red, not blue as it was painted in factory.
Pro
Joined: Nov 2012
Posts: 672
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From: Chesapeake Virginia
could be a rebuild that was decked, they usually manage to grind off the stampings the factory puts on the motor when the do it. without those numbers it going to be hard to tell if it's factory or not.
Team Owner
Joined: Sep 2006
Posts: 31,278
Likes: 4,372
From: Westminster Maryland
Hi m15,
I believe the 010 block is very common and was used for millions of engines.
The casting was machined for many, many configurations and hp specifications. L-48 was one of the many. The date code on the block will give you a clue as to whether the block MIGHT be appropriate for your car.
The 010 casting could be machined for 2 or 4 bolt main caps. If you remove the oil pan and take a peek you'll know whether you have 2 or 4 bolt main caps.
Regards,
Alan
I believe the 010 block is very common and was used for millions of engines.
The casting was machined for many, many configurations and hp specifications. L-48 was one of the many. The date code on the block will give you a clue as to whether the block MIGHT be appropriate for your car.
The 010 casting could be machined for 2 or 4 bolt main caps. If you remove the oil pan and take a peek you'll know whether you have 2 or 4 bolt main caps.
Regards,
Alan
Last edited by Alan 71; Sep 12, 2013 at 08:06 AM.
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
There is no "plate", the numbers you are looking for are stamped into the block, on a flat spot right in front of the passenger's side head, it's actually the part of the deck surface that is not covered by the head. If the deck has been milled, those numbers are gone, gone, gone...clean this flat spot well and look for numbers.
Scott
Scott
Team Owner
Joined: Jun 2000
Posts: 38,923
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From: Southbound
Cruise-In II Veteran
Safety Car
Joined: Nov 2008
Posts: 3,720
Likes: 554
From: Seattle Washington
The 010 Blocks were supposed to have a little bit more Nickel in the casting material. They were sometimes referred to as high Nickel Blocks. Wile this makes it sound like You have a really good high sought after Block what You have is one of the better production Blocks of the era. The Modern Aftermarket Blocks and GMPP Blocks have surpassed the 010's. This being said it could be 2 or 4 bolt. Take a look at the pictures above to try to find the serial Number, although I doubt that it is going to match if its still there. Better yet look at the Casting Date. Which its at the rear on the top on the right side where the Bell Housing bolts on. I'm going to bet its going to say early 70's.
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Melting Slicks
Joined: Apr 1999
Posts: 2,010
Likes: 3
From: Moon Twp. PA USA
You are correct, but old myths die hard. Especially for people who own '10' or '10 20' blocks.
My 'High HP' '76 L48 (maybe stock 150 HP) had a 10-20 block as stock. I
am sure that GM knew it was going into a performance vehicle when they were casting the block. Yah, right!
My 'High HP' '76 L48 (maybe stock 150 HP) had a 10-20 block as stock. I
am sure that GM knew it was going into a performance vehicle when they were casting the block. Yah, right!
Thread Starter
Cruising
Joined: Aug 2013
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I don't have fancy things like AC/ air condition in my car (even steering aid is not connected to motor).
I will check once more, but I think it's no longer there.
Thanks guys for feedback
, but I suppose I just got car that someone tried to restore, and went out of money.
BTW I have wired/fancy sticker, that it won prize of 500$ from The National Corvette Owners Association, catching and conviction thief that stole fellow member car.
I will check once more, but I think it's no longer there.
Thanks guys for feedback
, but I suppose I just got car that someone tried to restore, and went out of money.BTW I have wired/fancy sticker, that it won prize of 500$ from The National Corvette Owners Association, catching and conviction thief that stole fellow member car.
Thread Starter
Cruising
Joined: Aug 2013
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(sorry for doubling post)
Ok so I have checked Casting Date, but numbers are so blurry, it's hard to read.
I think it's like this:"1(or 4)1c8(it may be B)c" and then big letter S.
Also i saw big 40 number near GM logo on the driver side on the back.
Ok so I have checked Casting Date, but numbers are so blurry, it's hard to read.
I think it's like this:"1(or 4)1c8(it may be B)c" and then big letter S.
Also i saw big 40 number near GM logo on the driver side on the back.