Thought I had ID enough blocks that I could do them all but I am stumped. Acquired a roller cam block last week with the following numbers and what I know:
Casting-- 10243880 Vortec truck,crate and ZZ4 1995 -2000
Another source limits date to 95-96
Suffix code V01036CD V = Flint
0103 = build date= 3 Jan with no year
6CD = No clue. Can't find 6CD anywhere.
Could 6 be the build year and CD be the ID as a crate motor?
Cast date = J285 = Cast Oct 28 1995
On the pan rail A/01/03/9? this is printed. Last number is gone.
A= Assembled???
01/03 matches suffix code. If the last character was a 6 it would match my guess at the suffix 6CD and agree somewhat with a cast date in late October
To the rear of number 7 cylinder on the machined deck is the stamping G03320 I do not recall seeing anything like this and have no clue what it means.
None of the standard net sources I use add anything more. I can't find Chevy by the Numbers anywhere locally.
This thing came out of a boat. It was not the original engine.
I think I am more curious that anything else about this thing. Would appreciate any added info anyone can offer.

 

Have you checked out ..... http://www.mortec.com/ there is a huge amount of info there

Happy reading



10243880...350...95-00...2 or 4...Vortec truck, Gen.I crate motors and "ZZ4", roller cam, one piece rear seal



Some very early smallblocks from the mid 1950 model years had an Engine Assembly Date which only included the last two digits of the year. It might look something like "F56FG". On later model engines the engine assembly code looks similar to this "T0422TR". In this case the first letter "T" stands for an engine factory Tonawanda. Your's might have an "F" or "V" for Flint, MI. The next two digits stand for the month of the year, in this example "04" or the fourth month April. The "22" stands for the 22nd day of the month. So what do we have so far in this example? The motor was assembled at the Tonawanda factory on April 22nd. The years are not given. In the 50's and 60's, Chevy used a Roman numeral " I " for the number " 1 " in these engine assembly dates. Don't mistake this for a capitol letter "I". What we have left is the "suffix code" which in this example is "TR". Chevy used one to three letters of the alphabet to code the type of engine, transmission and vehicle into the suffix code. In later years, parts of the Vehicle Identification Number (V.I.N.) were also added before or after the Engine Assembly Date/Suffix code. In that case you might see "T0422TR 1123456789" stamped into the pad on the front passenger side of the block. Sometimes the engine V.I.N. was stamped into a different area of the block on the flange edge of the rear of the block, near the bellhousing mating surface. Sometimes the stamping is found above the timing cover mating surface on the front of the block.

Some of the Engine Suffix letter code combinations were used a number of times. For example, in 1974 the suffix code "CMR" was used on three different vehicle models with the same engine and transmission combinations. "CMR" was again used in '78 with a Corvette and a different engine/transmission combination. You would need to look at the block casting date to know which year the block was made to narrow down the possibilities. Relying solely on the suffix code to identify the original use of the block can be misleading. You need to look at ALL of the casting identifiers before making your determination. Deciphering VIN numbers, trim tags and original factory documentation can also help. If you need help decoding the suffix codes, just email us.

There is another type of stamping found on some blocks. This is the "CE" code. You might see something like this "CE123456" on the front pad of the block deck on the passenger side. The "CE" which alternatively has been known to stand for "Chevrolet Engine" or "Crate Engine" was used on blocks that were warranty replacement motors. The "CE" prefix was also used on "over the counter" blocks and engines. If a customer had problems with his original motor, while it was under warranty, it was replaced with an engine that was stamped "CE" with a number of numeral digits following it which serialized that particular engine. Likewise if a purchaser bought a new motor from the Chevrolet Parts counter, the front pad on the pasenger side of the block may have been stamped with a "CE" code.

A number of crate motors made by GM in Mexico, may have an "M" or "ML" prefix stamped into the front pad of the block followed by a series of numbers which serialize that particular crate replacement motor. You may also see a raised casting on the block or heads of "Hecho en Mexico" which means "Made in Mexico". Many of the new GM crate motors are being made in Mexico. Later model crate engines, sold over the counter by Chevrolet or GM Performance Parts, may have different prefix code identifiers stamped in to the front pad on the block, such as "ZZ3" or three letter codes such as "XXA".

The motors built in the McKinnon factory in Canada will have a "K" indicating the engine assembly plant.






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Hi Adrian, How goes the wiring project? Mor-Tech was my first stop. Thats where I got the basic block ID and the cast date. Unfortunately there is no reference to the suffix 6CD. This has become an exercise to satisfy a curiosity more than anything else. I was/am especially interested in the G03320 stamping since I haven't seen a marking in that location before. I traded for this thing, cost me $19.85 for the block with crank and pistons. I am using it as a base for a 383. Should be an interesting winter project.

 

Ive have done a little on the wiring, but as you can see Ive started on the other end while i was waiting for the book to turn up












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That is the way mine looked a few years ago. The problem you have with a project like that is you come to a point where you feel it will never end. Good luck.

 

This is just the begining of it all.

I am turning it into a pickup ...........Iam off to put on my flame suite on now....




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A pick up! Surely you jest.

 

Fraid not ..............watch this space

Here is the last pickup that I built, it is a Nissan Primera and used to be a 4 door saloon, this is what I use day to day for work and have been for about 7 years so she has done me well, its just that I fancied a change and the Vette will be A LOT easier to do than the last one.

Not only that it means that I get to drive a Vette to, from, and during work and still have the 90 to drive evenings and at the weekend ,
only problem is that after driving the 90 ( see sig for mods ) the 84 feels SOOOOOOOOOOOO SLOW .










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