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Old 05-16-2005, 09:49 PM
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what do these numbers on my block mean?

okay, I on the block ID pad there are these numbers: TO11OIU (I know the IU means 435hp with aluminum heads, but what does the rest tell me?) and then ten digits that the last six are the VIN # of the car, but what are the other four digits telling me? thanks a bunch.

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Old 05-19-2005, 03:17 PM
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Block numbers

T0110 IU
T= TONAWANDA
01= JANUARY
10= 10th DAY
IU= 1967 or 1968 Corvette 427CI, 435HP manual trans, Special High Performance.
VIN Code Format
The vin code format is stamped onto most engines. The format consists of divisional identification number, model year, assembly plant designation and vehicle serial or sequence number.
In 68-69 model cars, the serial (VIN) number of the car the engine was installed in is stamped next to, or under the engine code ID.
Starting in 1970, the serial number is stamped either above the oil filter, somewhere on the block pad (in front of the cylinder head), or on the transmission flange somewhere. Chevrolet issued technical service bulletins to indicate which engines were to recieve a vin stamp, so who knows what could have happend (or not happened).

VIN code format Example: 13N100001
(1 = Chevrolet, 3 = 1973, N = Norwood, 100001 = Production sequence of vehicle VIN)
Hope this helps you out. I'd love to have that engine.

Last edited by 66bowtie; 05-19-2005 at 03:22 PM. Reason: not finished
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