Author Topic: Early 68 Z28 engine  (Read 7651 times)

jvb6648

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Early 68 Z28 engine
« on: April 17, 2011, 02:22:31 AM »
Did the early 68 Z28 date, 12E, come with the 389257 small journal block or did all 68's have the 3914678 block?
Jim
68 Z/28

tmodel66

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Re: Early 68 Z28 engine
« Reply #1 on: April 17, 2011, 02:31:11 AM »
They were the 678 blocks. Here's a link to read about them.

http://www.camaros.org/drivetrain.shtml#BlockCast
Daniel  
'69 SS 350/4 speed  Fathom Green--POP

jvb6648

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Re: Early 68 Z28 engine
« Reply #2 on: April 17, 2011, 03:52:27 AM »
Thanks, I've been to that site, also saw sites that said 257 was used in 68. Bought the car in '72, 3rd owner, original owner said he sold it with original engine. When I tore the engine down it was 2 bolt main small journal. So I bought a new 4 bolt block and built that up.Trying to decide if I should go for correct block.
Jim
68 Z/28

tmodel66

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Re: Early 68 Z28 engine
« Reply #3 on: April 17, 2011, 04:00:34 AM »
Can you get the stamped numbers off the engine pad and post it? We can tell what kind of engine it is by the pad numbers.
Daniel  
'69 SS 350/4 speed  Fathom Green--POP

68camaroz28

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Re: Early 68 Z28 engine
« Reply #4 on: April 17, 2011, 11:26:51 AM »
Our late Dec. 67 built MO has the 678 block.
Chick
68 Z/28 NOR 01B Orig motor/trans/rear
69 Z/28 NOR 07A Orig Block & GM Cross-ram/carbs
69 L34 Rest. Nova Father/Son Car
69 L78 Surv Nova Purch 4/69 31K miles
67 L89 Corv Tribute
68 Corv 427/400 Orig motor
07 Corv Z06
R 68Z build- http://www.camaros.net/forums/showthread.php?t=182584

jvb6648

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Re: Early 68 Z28 engine
« Reply #5 on: April 17, 2011, 03:58:46 PM »
Well that's the issue. The block that was in the car when I bought it is long gone but it was small journal. I don't think 2nd owner changed engine, he sold it after a year, it wasn't very practical for him. I'll call the original owner on Mon. He owns a speed shop and raced the car so I know he had the engine out. With any luck the original block is laying in a corner.
Jim
68 Z/28

KurtS

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Re: Early 68 Z28 engine
« Reply #6 on: April 23, 2011, 01:11:07 AM »
Thanks, I've been to that site, also saw sites that said 257 was used in 68.
Um, "that site" is this site. ;)
There's only one block shown for 302's - 3914678.
Kurt S
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jvb6648

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Re: Early 68 Z28 engine
« Reply #7 on: April 25, 2011, 12:02:59 PM »
I talked to the original owner. The car arrived at the dealer on New Years day, he took delivery on the 4th. I'll have to recheck build date when I get back home. Bodyman must have misread it as 12e. Owner swears that car came with a 2 bolt main block. He owns a speed shop and raced that car so he was into the engine. I'll be back in a week.
Jim
68 Z/28

fireZ

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Re: Early 68 Z28 engine
« Reply #8 on: April 25, 2011, 12:15:08 PM »
They were only 2 bolt main block.678 blocks only
1968 Z28 LA Built
LIC # RPO Z28

KurtS

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Re: Early 68 Z28 engine
« Reply #9 on: April 26, 2011, 05:59:08 PM »
Yup, 4-bolt main small blocks didn't happen until 69.
Kurt S
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jvb6648

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Re: Early 68 Z28 engine
« Reply #10 on: May 01, 2011, 01:49:28 AM »
OK thanks I've got that now. But riddle me this, can a car with a 12E build date be delivered on Jan. 1st, I have the original sales invoice dated Jan. 4, the day the car was paid for and picked up? Christmas was on a Mon. so the car would have to be built and delivered to Buffalo NY in 7 days.
Jim
68 Z/28

KurtS

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Re: Early 68 Z28 engine
« Reply #11 on: May 02, 2011, 04:09:39 AM »
I'd have to see the VIN to comment absolutely, but may be possible.
Kurt S
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jvb6648

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Re: Early 68 Z28 engine
« Reply #12 on: May 03, 2011, 02:46:18 AM »
The more I thought about it, it probably is doable. The invoice didn't specify a Z-28 option but had "special rear springs" "power disc Brakes" and "special performance equipment" listed as options. Do you think this would work as documention?
124378N365977
Jim
68 Z/28

KurtS

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Re: Early 68 Z28 engine
« Reply #13 on: May 11, 2011, 02:27:46 PM »
"special performance equipment" normally means Z28. Really depends on how detailed they wrote up the invoice, but it sounds promising.
With that VIN, probably was shipped a few days before the end of the year, so possible.
Kurt S
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