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#1
07-20-2006, 07:41 PM
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Re: weird engine manufacture code
Also noticed there is one extra digit in there..T12223S
 The only codes the 1968 L-36 Biscayne used were: *IB w/TH400 Police *IC w/3 speed Police *IE & IH w/Manual *IJ & IS w/TH400 
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#2
07-20-2006, 09:29 PM
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Re: weird engine manufacture code
[ QUOTE ]
Also noticed there is one extra digit in there..T12223S The only codes the 1968 L-36 Biscayne used were: *IB w/TH400 Police *IC w/3 speed Police *IE & IH w/Manual *IJ & IS w/TH400 [/ QUOTE ] Yes that is what I mean. Maybe the engine code on this engine is "3S". This still doesn't match the accepted GM codes for this engine in this car... I still can't find a reference anywhere to this engine code. When I last looked at the block (a while ago now) I'm pretty sure it said this same stamping, I wasn't too concerned except that it match, and Didn't pay much attention beyond the date portion at that time, maybe there is more stamping after that part?, but then there would be way to many digits, and this is the correct number of digits the way it stands... I wonder if any ex-Tonawanda employees lurk here and might shed some light......
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2012 ZL1 black M6 1968 L36 4 spd Biscayne 1957 270 hp Corvette
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#3
07-20-2006, 11:57 PM
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Re: weird engine manufacture code
I wonder.. could it not have been the assembly plant that hammered in the engine app. code? maybe the T1222 was on it when shipped to St. Therese from Tonawanda, and they added the 3S application code at Therese? The "S" could be for St.Therese, and the 3? maybe the 3rd engine used?? or 3 for the application or usage?
I asked George if he could elaborate on the odd engine number and he said he couldn't. I can't imagine they had too many of these engines in the plant, as only 25 of these cars were built in Canada. Does anyone else on the site have one of these cars? maybe thier engine number is similar...
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2012 ZL1 black M6 1968 L36 4 spd Biscayne 1957 270 hp Corvette
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#4
07-21-2006, 12:12 AM
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Re: weird engine manufacture code
I have a '68 L35 engine coded 4T. It is a Chevelle 4 speed engine according to GM Oshawa. Looks like there might be more than one alphanumeric engine code.
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Chevelleless after 46 years......but we did find a low mileage, six speed, silver 2005 Corvette. It will just have to do for now. 
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#5
07-21-2006, 12:54 AM
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Re: weird engine manufacture code
Aha! we are on to something.
Now we need to discover who has a list of these alpha numeric secret codes.....
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2012 ZL1 black M6 1968 L36 4 spd Biscayne 1957 270 hp Corvette
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#6
07-21-2006, 01:10 AM
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Re: weird engine manufacture code
4T is known and a '68 Chevelle L35 396/325 manual. . 4U is also known and a '68 Chevelle L34 396/350 manual. .
I'll look tonite as I have an old Canadian book w/ some numeric codes I've never found elsewhere....just in case it's there? I fixed a '63 Vette about 20 years ago that had a small block w/ 77 as the suffix....sure enough it was in the old book as a '67 Chevelle 283 so you never know?  ~ Pete
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I like real cars best...especially the REAL real ones!
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