Author Topic: L78 engine code help  (Read 2881 times)

birdman

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L78 engine code help
« on: April 21, 2006, 05:02:55 AM »
I have a late build date of 09E (sept 69)  X22 4-speed camaro that is missing the original block. I found a 3969854 4 bolt dated H 31 9, the block has beed decked clean. The heads are 3964291 square ports dated I 10 9 & I 12 9. Does any one know if the late built camaros use the JH code disginating a 396 CI or did they change over to the 402 CI with a C - - code.

JohnZ

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Re: L78 engine code help
« Reply #1 on: April 21, 2006, 02:57:28 PM »
Page 139 of Jerry's book indicates that many late 854 blocks (402's) used the "C" prefix ahead of the usual two-character suffix.
'69 Z/28
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KurtS

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Re: L78 engine code help
« Reply #2 on: April 24, 2006, 07:03:43 AM »
That might be in Jerry's book, but Camaro continued using the 2 digit code from what I've seen. I've only heard of one or two exceptions and have not seen pics of those pads.....
Kurt S
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birdman

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Re: L78 engine code help
« Reply #3 on: April 28, 2006, 02:56:35 AM »
Being that late in the year and the fact that Chevelles & Nova,s were being produced for the 1970 model year would they have changed over to code CKO which  I believe is correct for 1970 396/375 HP ??

RickH

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Re: L78 engine code help
« Reply #4 on: April 30, 2006, 09:19:52 PM »
1969 Camaro never used the three letter engine designation.

Rick H.