castings numbers for my 454 engine - Chevelle Tech
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post #1 of 21 (permalink) Old Jul 11th, 10, 5:18 AM Thread Starter
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Michel
 
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castings numbers for my 454 engine

Hello,

I have a 454 engine in mij chevelle and i need some help with the casting numbers i found on my engine , intake and heads.

On my engine i found casting number 14015445 at the back but on the side near the exhasut i found GM 7.4 L and that means late model block.

On the intake i found casting number 3964297 hi perf

The cylinder heads gave a very strange number. That number is 8272980 hi perf

Can anybody tell me more about this complete engine?

Gr michel
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post #2 of 21 (permalink) Old Jul 11th, 10, 11:21 AM
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Frank Riley
 
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Re: castings numbers for my 454 engine

I think your head # is incorrect....

Block: 14015445 454 78-90 2 or 4-bolt mains

Heads: 6272990 454 70-up Rectangular/OPEN 454 service replacement, used on some MKIV crate engines, 118cc chamber

70-454 LS5
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post #3 of 21 (permalink) Old Jul 11th, 10, 1:02 PM Thread Starter
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Michel
 
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Re: castings numbers for my 454 engine

Quote:
Originally Posted by 71-454 View Post
I think your head # is incorrect....

Block: 14015445 454 78-90 2 or 4-bolt mains

Heads: 6272990 454 70-up Rectangular/OPEN 454 service replacement, used on some MKIV crate engines, 118cc chamber
Thanx for your help but the head is correct. I will make a picture too show you the casting number off the gm head is 8272980.

It is rectangular.

I have read that the 454 engines with casting 14015445 did not have gm 7.4 L on the engine side and that late model 454 engines had the sign on the side off the engine.
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post #4 of 21 (permalink) Old Jul 11th, 10, 1:21 PM
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Doc. Smokum
 
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Re: castings numbers for my 454 engine

likely a 80's ls-6 crate motor. I'd bet it's 990 on the head too but stranger things have happened.

There is a pad just above the timing cover directly in the center. If there is a stamping in that pad, post it. I believe the HP crate motors had a stamping here and some of the members here know what they mean. I have a crate LS-6 and it has a specific stamp there that designates this.

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post #5 of 21 (permalink) Old Jul 11th, 10, 2:51 PM
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Re: castings numbers for my 454 engine

And later blocks have the engine id code on the front of the block ,above the timing chain cover.
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post #6 of 21 (permalink) Old Jul 11th, 10, 5:53 PM Thread Starter
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Re: castings numbers for my 454 engine

Here are some pics of my heads





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post #7 of 21 (permalink) Old Jul 11th, 10, 9:32 PM
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Frank Riley
 
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Re: castings numbers for my 454 engine

Well all I can say is Mortec isn't aware of a 8272980 BBC head casting number...and they are the general authority on Chevrolet Block & Head casting numbers. Good luck tracking it down.

70-454 LS5
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post #8 of 21 (permalink) Old Jul 11th, 10, 9:36 PM
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Re: castings numbers for my 454 engine

Um,that's 6272990 as Frank posted.
6272990 = 454 ,71-94 ,2.19/1.88 ,118cc Replacement Rectangular port 325cc intake.

See if there's an id code as I said in my prior post.
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post #9 of 21 (permalink) Old Jul 11th, 10, 9:49 PM
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Re: castings numbers for my 454 engine

looks like 990 to me too

1968 Chevelle Sb
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1973 SS 454 Chevelle
1974 S-3 454 Chevelle
1955 Delray LS1
1967 Nova 496
1969 nova 427
1969 Camaro 350
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post #10 of 21 (permalink) Old Jul 11th, 10, 10:09 PM
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post #11 of 21 (permalink) Old Jul 12th, 10, 3:55 AM Thread Starter
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Re: castings numbers for my 454 engine

Quote:
Originally Posted by Mike View Post
Um,that's 6272990 as Frank posted.
6272990 = 454 ,71-94 ,2.19/1.88 ,118cc Replacement Rectangular port 325cc intake.

See if there's an id code as I said in my prior post.
The front off my engine has no code. Above the timing chain cover is it blank.
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post #12 of 21 (permalink) Old Jul 12th, 10, 4:15 AM Thread Starter
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Re: castings numbers for my 454 engine

Thanx all for your great help!

Does somebody know how much horsepower this engine will produce in this setup?

Last edited by michel1972; Jul 12th, 10 at 1:12 PM.
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post #13 of 21 (permalink) Old Sep 12th, 11, 4:18 PM Thread Starter
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Re: castings numbers for my 454 engine

When i removed my timing today i saw a strange code above the timing gear.

It says TJOIXAA7

Does somebody know what that means?

On my engine i found casting number 14015445 at the back but on the side near the exhasut i found GM 7.4 L and that means late model block.
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post #14 of 21 (permalink) Old Sep 12th, 11, 5:11 PM
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Re: castings numbers for my 454 engine

XAA = 454/450hp , Crate LS-6 (p/n 366250)

uıɐbɐ ʎɐqǝ ɯoɹɟ pɹɐoqʎǝʞ ɐ buıʎnq ɹǝʌǝu ɯ,ı
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post #15 of 21 (permalink) Old Sep 12th, 11, 6:11 PM Thread Starter
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Re: castings numbers for my 454 engine

Quote:
Originally Posted by Mike View Post
XAA = 454/450hp , Crate LS-6 (p/n 366250)
Is that good or not?

The number p/n 366250 i can not find.
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