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L-82 VS L-48 engine help

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Old Nov 14, 2016 | 02:23 PM
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Default L-82 VS L-48 engine help

I know the car was a L-48 based on Vin Decode, but i also know the engine was swapped for another early model Corvette engine. on the back of the block (near bell housing) the numbers 3970010 is casted.

I can find any other numbers.

Is there a way to find out if this is a L48 or l82 engine?
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Old Nov 14, 2016 | 02:25 PM
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there is no code on the engine pad in front of the passenger side cylinder head?
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Old Nov 14, 2016 | 02:48 PM
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Originally Posted by wowed777
...Is there a way to find out if this is a L48 or l82 engine?...
L-82s has push rod guide plates. Pull a valve cover and see if you have them.

I agree with Melwff; the engine ID stamp would be your best source of confirmation.

Last edited by Easy Mike; Nov 14, 2016 at 02:49 PM.
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Old Nov 14, 2016 | 03:13 PM
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Hi W,
This is the location of the pad MW and EM described.
It was originally stamped with coded information that described what configuration this particular engine was assembled in at the engine plant, and, what vehicle it was originally installed in.
The information won't offer any help on what might have been done to the engine since that time.
Regards,
Alan



Upper is the engine information and the lower is the vehicle information.



Last edited by Alan 71; Nov 14, 2016 at 03:17 PM.
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Old Nov 14, 2016 | 08:07 PM
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Block number 3970010 was used for 69-72 Corvette's (350's) and 69 Camaro's (302) 4 bolt main engines. It was also used for 69-79 truck and passenger cars, 2 and 4 bolt main engines.

Last edited by 76vette1; Nov 14, 2016 at 08:08 PM.
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Old Nov 14, 2016 | 08:13 PM
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Unfortunately

this is what my block plate looks like. wondering if there is any way to get information on this engine.
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Old Nov 14, 2016 | 09:01 PM
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Originally Posted by wowed777
Unfortunately

this is what my block plate looks like. wondering if there is any way to get information on this engine.
If you can borrow a bore scope from someone, run it down the dipstick tube and see if the block has 4-bolt mains. If it does, there's a good chance it is at least an L-82 short block.

Good luck... GUSTO
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Old Nov 14, 2016 | 09:56 PM
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Chiming in on this because I'm revisiting the same question now. I've heard to look for the pushrod guides before. However, both the L48 and L82 engines used 882 cylinder heads (at least my year). Why would the L82 heads have pushrod guides but the L48 not have pushrods? I just want to know the logic behind the design if anyone knows a good reason.
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Old Nov 15, 2016 | 07:52 AM
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Originally Posted by Masonwader
...Why would the L82 heads have pushrod guides but the L48 not have pushrods?...
Guide plates and four bolt mains were part of the L-82 engine package. You also got a forged crankshaft as part of the deal, among other things.
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Old Nov 15, 2016 | 09:40 AM
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If you look hard numbers appear to still be under the paint which can be removed
looks like a chrome timing cover someones been in there at some point
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Old Nov 15, 2016 | 09:50 AM
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Originally Posted by cuisinartvette
If you look hard numbers appear to still be under the paint which can be removed
looks like a chrome timing cover someones been in there at some point
Im going to try to use some paint thinner to get to those numbers. Hopefully i can make them out so i can see what i have.
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