Help with 427 Engine Codes
Thread Starter
Instructor
Joined: Feb 2005
Posts: 122
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From: Greensboro North Carolina
Help with 427 Engine Codes
I really need some help with identify what engine is in my 69. If there are any block experts I could really use some assistance. Here is what I have found. The rear block by the bell housing reads 393352 GM HIPERF (I think) difficult to read. The front block stamping is T0506LI 190218715. Intake manifold numbers are 3933198.
Someone please steer me in the right direction.
Someone please steer me in the right direction.
Intermediate
Joined: Jun 2018
Posts: 25
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From: Calgary, Alberta
My original 69 390 hp 427 is stamped T0226MH (Feb 26 - 226). Your car may be May 6 - 506. The MH on the back end of mine indicated 390 hp, 4 spd, transistorized ignition (K66). I'm not sure if LI is a code. If it reads LT you have a nice one. Note the balance of the stamping sound be as follows: 19S718075. Last five characters should match vehicle VIN. Let me know if what you find out as my car's VIN is in the same ball park. Mike 403-370-1665. Google "1969 Corvette Engine Block Codes".
Thread Starter
Instructor
Joined: Feb 2005
Posts: 122
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From: Greensboro North Carolina
Yes the LI and the block code on bell housing is what I can’t find info for. That’s what was throwing me off. I will check again. The vin does not match the engine stamp 
Race Director
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From: SW Florida.
i found LI as 335 hp 69 427 auto trans.. i can't find block casting. keep in mind cast numbers can have meat missing or a casting flaw can add meat. 3,8,5,6,9 can all be confused with each other.
Last edited by derekderek; Apr 6, 2019 at 07:29 AM.
Team Owner
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From: Southbound
Cruise-In II Veteran
Could this be T0506LL?
1969 Corvette VIN derivatives were 19S7xxxxx so you have a problem with the 02..
You might want to take a closer look at both numbers.
What is the time built date on the trim tag? It must be after May 6 since the engine was assembled and shipped to St. Louis before the car was built
.
...190218715...
You might want to take a closer look at both numbers.
What is the time built date on the trim tag? It must be after May 6 since the engine was assembled and shipped to St. Louis before the car was built
.
Last edited by Easy Mike; Apr 6, 2019 at 07:49 AM.
Melting Slicks
Joined: Sep 2004
Posts: 3,208
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From: Northeast
Here is the listing for stamp pad: http://www.nastyz28.com/gm-chevy-cod...-suffix-14.php
intake manifold & other info: https://www.nastyz28.com/bbcmenu.php#engine
intake manifold & other info: https://www.nastyz28.com/bbcmenu.php#engine
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Thread Starter
Instructor
Joined: Feb 2005
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From: Greensboro North Carolina
Thank you for all of your help and input. CanadaGrant is right my rear block casting is 3968512. That mystery is solved.
I do believe the front engine is T0506LT instead of LI. Still looks like LI but i think there is a scratch underneath that's making it look like a I. Really difficult to see the difference.
My VIN appears to be 194679S716747
The trim tag date is C19 or G19. Looks more like a C but G makes more sense.
Last edited by 98LS1VETTE; Apr 6, 2019 at 09:55 AM. Reason: Editing Trim Tag Letter
Melting Slicks
Joined: Jul 2006
Posts: 3,095
Likes: 795
From: Massapequa Park NY
The stamping is definitely LI.
The block is not stamped properly for a 69 corvette. If your corvette is VIN 194679S716747 then your original engine should be stamped 19S716747 not 190218715. Also, your car was built Feb 18/19 1969 and that does not line up with a 0506 engine assembly date. So the engine is not original, but not sure what it came out of.
One more thing to add about your trim tag. For the month of February, the tag is supposed to have a letter G stamped on the trim tag. However, in 1968 and 1969 the die that was used to stamp the G on the trim tags had become broken (the cross bar of the letter G broke off) and nobody noticed it at the time. So it will look like a letter C. But its a G.
The block is not stamped properly for a 69 corvette. If your corvette is VIN 194679S716747 then your original engine should be stamped 19S716747 not 190218715. Also, your car was built Feb 18/19 1969 and that does not line up with a 0506 engine assembly date. So the engine is not original, but not sure what it came out of.
One more thing to add about your trim tag. For the month of February, the tag is supposed to have a letter G stamped on the trim tag. However, in 1968 and 1969 the die that was used to stamp the G on the trim tags had become broken (the cross bar of the letter G broke off) and nobody noticed it at the time. So it will look like a letter C. But its a G.
Last edited by ed427vette; Apr 6, 2019 at 01:26 PM.
Burning Brakes
Joined: Dec 2003
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The stamping is definitely LI.
The block is not stamped properly for a 69 corvette. If your corvette is VIN 194679S716747 then your original engine should be stamped 19S716747 not 190218715. Also, your car was built Feb 18/19 1969 and that does not line up with a 0506 engine assembly date. So the engine is not original, but not sure what it came out of.
One more thing to add about your trim tag. For the month of February, the tag is supposed to have a letter G stamped on the trim tag. However, in 1968 and 1969 the die that was used to stamp the G on the trim tags had become broken (the cross bar of the letter G broke off) and nobody noticed it at the time. So it will look like a letter C. But its a G.
The block is not stamped properly for a 69 corvette. If your corvette is VIN 194679S716747 then your original engine should be stamped 19S716747 not 190218715. Also, your car was built Feb 18/19 1969 and that does not line up with a 0506 engine assembly date. So the engine is not original, but not sure what it came out of.
One more thing to add about your trim tag. For the month of February, the tag is supposed to have a letter G stamped on the trim tag. However, in 1968 and 1969 the die that was used to stamp the G on the trim tags had become broken (the cross bar of the letter G broke off) and nobody noticed it at the time. So it will look like a letter C. But its a G.
Melting Slicks
Joined: Jul 2006
Posts: 3,095
Likes: 795
From: Massapequa Park NY
I always like to see cars that are built near mine to compare. His was built 82 after mine. I would love to check out yours. If you go to any shows or cruises this year PM me and maybe we can meet up.
Burning Brakes
Joined: Dec 2003
Posts: 1,146
Likes: 150
will do,trying for Captree before Memorial day and Oakdale on Thurs,I'll p.m. Mike
Last edited by blue427; Apr 7, 2019 at 08:00 AM.
Team Owner
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From: Southbound
Cruise-In II Veteran
My VIN appears to be 194679S716747...[/QUOTE]
VIN and VIN derivative do not match. Your engine is not original for your car.
Last edited by Easy Mike; Apr 7, 2019 at 09:18 AM.
Thread Starter
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From: Greensboro North Carolina
Race Director
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From: SW Florida.
3933163 or 3933198 intake. both rectangle intakes. 98 is a L88. looks like a long time ago, somebody buffed the 63 off and stamped hat 9 and i assume an 8 newt to it. pull a valve cover and get head casting numbers and pic of top of the whole engine.