Big Block Engine Codes - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Seanext** · 02-21-2017, 09:52 PM

I bought a project truck that came with a 454. I am having trouble finding the correct info on the engine. The casting number is 14015445 which is a 454 1978-1990 2 or 4 bolt main. The only numbers on the pad in front of the pass head is either 1JJ506838 or JJ506838. The first 1 could be a scratch as it is faint and the other letters and number are strong stamping. When looking online there should be two numbers on this pad but I can only find one. I looked above the oil filter on the pad but is still rough never machined down so there is no number there.
I have tried all the internet searches but I could not find anything. Any help would be greatly appreciated as I need to get parts for it.

**Seanext** · 02-21-2017, 10:06 PM

Ok look at another thread and found there is another number on the block just in front of the intake TO 120PLB

68shortwide · 02-22-2017, 02:03 PM

What are you wanting to know? Just more basic info like foundry and year or what? Do you have heads on it? Can you pull a valve cover and see what casting the heads are?

davepl · 02-22-2017, 02:11 PM

I did a quick look and couldn't find ANYTHING with a PLB suffix. Are you fairly sure you got that correct?

**Seanext** · 02-22-2017, 04:43 PM

I found the PLB listed on the LMC web site and it is listed as a 1988 C20 454 TBI, but it has a Edelbrock intake and carb 1406, and a turbo 400 still attached. I would like to know if 2 or 4 bolt main will have to pull the pan for that to be sure. Heads are 14092360.
I would like to know for sure what year and what it came out of from parts. It is complete minus starter, but has no belts. General info like plug gap it has a EFI in it now was that what it started life with?

Thanks for all the help.

davepl · 02-22-2017, 08:45 PM

Seanext, any chance you have a link to wherever you found it? It more complete, or at least different, from the sources I was looking at so would like to have that one in my repertoire.

**Seanext** · 02-22-2017, 08:57 PM

I look at the LMC catalog for Chevy 1973 1987 under engine identification on page 11
listed as
454cid 7.4 liter VIN CODE N V8 engine

bow-tie-bandit · 02-22-2017, 10:18 PM

Don't know if this will help any more but this is what I have.

**Seanext** · 02-24-2017, 07:42 PM

That give me a little more information. Thanks

02-21-2017, 09:52 PM	#1
Seanext Senior Member Join Date: Mar 2013 Location: Dallas NC Posts: 583	Big Block Engine Codes I bought a project truck that came with a 454. I am having trouble finding the correct info on the engine. The casting number is 14015445 which is a 454 1978-1990 2 or 4 bolt main. The only numbers on the pad in front of the pass head is either 1JJ506838 or JJ506838. The first 1 could be a scratch as it is faint and the other letters and number are strong stamping. When looking online there should be two numbers on this pad but I can only find one. I looked above the oil filter on the pad but is still rough never machined down so there is no number there. I have tried all the internet searches but I could not find anything. Any help would be greatly appreciated as I need to get parts for it.

02-21-2017, 10:06 PM	#2
Seanext Senior Member Join Date: Mar 2013 Location: Dallas NC Posts: 583	Re: Big Block Engine Codes Ok look at another thread and found there is another number on the block just in front of the intake TO 120PLB

02-22-2017, 02:03 PM	#3
68shortwide Registered User Join Date: Jul 2014 Location: Missouri Posts: 1,427	Re: Big Block Engine Codes What are you wanting to know? Just more basic info like foundry and year or what? Do you have heads on it? Can you pull a valve cover and see what casting the heads are? __________________ Jack 1968 swb on air

02-22-2017, 02:11 PM	#4
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Re: Big Block Engine Codes I did a quick look and couldn't find ANYTHING with a PLB suffix. Are you fairly sure you got that correct? __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible

02-22-2017, 04:43 PM	#5
Seanext Senior Member Join Date: Mar 2013 Location: Dallas NC Posts: 583	Re: Big Block Engine Codes I found the PLB listed on the LMC web site and it is listed as a 1988 C20 454 TBI, but it has a Edelbrock intake and carb 1406, and a turbo 400 still attached. I would like to know if 2 or 4 bolt main will have to pull the pan for that to be sure. Heads are 14092360. I would like to know for sure what year and what it came out of from parts. It is complete minus starter, but has no belts. General info like plug gap it has a EFI in it now was that what it started life with? Thanks for all the help.

02-22-2017, 08:45 PM	#6
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Re: Big Block Engine Codes Seanext, any chance you have a link to wherever you found it? It more complete, or at least different, from the sources I was looking at so would like to have that one in my repertoire. __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible

02-22-2017, 08:57 PM	#7
Seanext Senior Member Join Date: Mar 2013 Location: Dallas NC Posts: 583	Re: Big Block Engine Codes I look at the LMC catalog for Chevy 1973 1987 under engine identification on page 11 listed as 454cid 7.4 liter VIN CODE N V8 engine

02-22-2017, 10:18 PM	#8
bow-tie-bandit Live life and be happy. Join Date: May 2003 Location: Spokane,Washington Posts: 266	Re: Big Block Engine Codes Don't know if this will help any more but this is what I have. Attached Images

02-24-2017, 07:42 PM	#9
Seanext Senior Member Join Date: Mar 2013 Location: Dallas NC Posts: 583	Re: Big Block Engine Codes That give me a little more information. Thanks



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