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L-34 396 Identfication

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69ChevelleGuy

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1969 Chevelle SS 396 L-34 M-21
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Discussion starter · #1 ·
I was wondering if L-34 have 2 or 4-bolt mains and if the block had Hi Perf PASS stamped beside the oil filter and under the timing cover on the right side of the cam bearing if that means its a L-34.

Thanks

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Steve

1969 Chevelle SS 396 L-34
 
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Discussion starter · #3 ·
I believe to have a L-34 in mine and today tore the engine down for a overhaul and it had 2 bolt mains and Hi Perf PASS casted on it. I am pretty sure it is a L-34 because of the steel crank and not cast iron.

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Steve

1969 Chevelle SS 396 L-34
 
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#5 ·
I thought HiPerf was on all the 396 Pass blocks??? Maybe the Tag Team guys would know??

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Ron Cook TC Gold Member #1276
1969 300 Deluxe HTSS396 69 300 Deluxe 325HP L35 69memorylane 1971 Malibu 2DR HT
"Never let fear and good judgement hold you back!"
 
#7 ·
"Chopped Liver"
Yes the L-34 and the LS-5 do have Hi-perf cast into them.The parts books also consider them to be Hi-perf engines.
The L-72,L-78,L88,LT-1,Z-16,ZL-1 and LS-6 are considered "Special Hi-perf in the parts books.I believe my head has Sp/Hi-perf cast into it,as well as my 4 bolt main block.


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Rick Peters
ACES#175
1970 L-78...ON THE MOVE
 
#10 ·
The block will have Hi Perf pass cast on to it but the heads WILL NOT.Your heads will only have Pass(passenger) stamped on them referring to regular oval port design.All rectangular large port heads have Hi-Perf cast on to them NOT Spec.Hi-Perf.There was No Sp/hi-perf markings on any 4-bolt "special high performance" motor either.Both 2 and 4 bolt blocks were stamped Hi-perf

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Dean Ciampi
Team Chevelle Gold #52
Aces #3094 MY LS6 CHEVELLE
My 2000 Z28

[This message has been edited by LS6-M22 (edited 09-17-2001).]
 
#11 ·
I was pretty sure that a '70 chevelle 396 L34 engine had a forged crank, not steel, that was up until a couple of minutes ago...and the L78 and LS6 were steel and not cast. I'm not sure about the LS5...
 
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#14 ·
<BLOCKQUOTE>quote:</font><HR>Originally posted by LS6-M22:
The block will have Hi Perf pass cast on to it but the heads WILL NOT.Your heads will only have Pass(passenger) stamped on them referring to regular oval port design.All rectangular large port heads have Hi-Perf cast on to them NOT Spec.Hi-Perf.There was No Sp/hi-perf markings on any 4-bolt "special high performance" motor either.Both 2 and 4 bolt blocks were stamped Hi-perf

<HR></BLOCKQUOTE>

Thats right.I knew there was a difference between what was on the block vs. what was on the heads.I stand corrected.

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Rick Peters
ACES#175
1970 L-78...ON THE MOVE
 
#15 ·
thanks Don lightfoot, i appreciate it...forged steel being better than cast iron....thank you , thank you, thank you.

teach
 
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