327 on side of Block??

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06-28-2013, 01:06 AM

96LT1Z

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327 on side of Block??

When i swapped my oil pan the other day i noticed 327 is on the side of the motor in my car?? Lol is that supposed to be there?

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06-28-2013, 01:30 AM

fex77k

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Yea they all say that.

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06-28-2013, 01:39 AM

96LT1Z

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lol alright i wasnt worried or anything i was wondering what it was, whats it mean?

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06-28-2013, 01:47 AM

stevo9389

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it means that you do not have a L99 block

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06-28-2013, 01:52 AM

fex77k

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Quote:

Originally Posted by 96LT1Z

lol alright i wasnt worried or anything i was wondering what it was, whats it mean?

No idea why it says that, but all LT1 blocks I've owned have had it. They were still making a bunch of iron small blocks when the LT1's were hot off the press so it could have been a identifier.

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06-28-2013, 07:33 AM

96z28_lt1

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i would imagine it meant it was originally a 327 block casting but i don't know for sure. Mine says it as well.

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06-28-2013, 07:44 AM

Ed Wright

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Would be your cubic inches. How would the foundry know what crank was in it?

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06-28-2013, 07:44 AM

alexus6798

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Every Lt1 that I have seen have had that on there.

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06-28-2013, 08:31 AM

shbox

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It is the last 3 digits of the original block part/casting number. 10125327

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06-28-2013, 04:43 PM

#10

96LT1Z

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Well at least mines not different from everyone elses

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06-28-2013, 05:17 PM

#11

jaycenk

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While we are on the subject, Anyone know if the mini LT1 has the same cast number? Is it the same block as the 350 LT1's?

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06-28-2013, 07:12 PM

#12

fex77k

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Quote:

Originally Posted by jaycenk

While we are on the subject, Anyone know if the mini LT1 has the same cast number? Is it the same block as the 350 LT1's?

Different bore, not worth it. There will be a 5.7 casting on top of LT1's, at least that's what I remember on mine.

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06-28-2013, 07:50 PM

#13

shbox

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Quote:

Originally Posted by jaycenk

While we are on the subject, Anyone know if the mini LT1 has the same cast number? Is it the same block as the 350 LT1's?

It has "4.3" cast on it. No 327.

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06-28-2013, 10:14 PM

#14

jaycenk

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good to know thanks.

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06-30-2013, 05:56 PM

#15

GIZMO

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The L99 has 588 cast into the side of the block.

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07-01-2013, 11:53 AM

#16

Speedy

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I love that 327 on the block. Very nostalgic, and no longer made. There was only one genuine small block engine, if it doesn't have the 327 casting it's an imposter. It has won more races than any other V8 engine.

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08-19-2017, 06:44 AM

#17

F33RL3SS420

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Confused

Quote:

Originally Posted by GIZMO

The L99 has 588 cast into the side of the block.

what if my block has both the 588 and 327 casts on the block? Back passenger flange said its a 10125327. My dad said its a 96 lt1/lt4 block I'm just trying to verify.