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Engine Block Stamping

67GTX440

67GTX440

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Can anyone decode what this stamping tells me. Block in my 67 GTX that is supposed to be original. Is it? There is supposed to be a stamping by the heater hoses, but if there is, I sure can't see it. If that is a clock or calendar at the bottom, it only has 9 hours or 9 months. I know the D and N is supposed to designate day or night shift.
IMG_5971[1].JPG
 
Transmission is supposed to be original also, but I cannot find any stampings on it either.
 
67GTX440 said:
Can anyone decode what this stamping tells me. Block in my 67 GTX that is supposed to be original. Is it? There is supposed to be a stamping by the heater hoses, but if there is, I sure can't see it. View attachment 534294
Click to expand...
There is a flat boss next to the heater hoses. You may have to scrap several layers of pair to see it. It was hand stamped at the factory.
 
There is also a date cast on the block too. Here's a 67 block and pad picture.

23889444768_4732741c2a_o.jpg 37484200790_a6010ea652_o.jpg
 
Need car build date on fender tag.
The trans numbers are on driver's side along pan rail.
Can't tell what they should be one group would be trans part number, a 7 digits.
 
Last edited:
69L48Z27 said:
There is also a date cast on the block too. Here's a 67 block and pad picture.

View attachment 534311 View attachment 534312
Click to expand...
I will have to look again. I have have the date above what I posted and missed it or it was visually blocked by something. Between two temperature gauge sending units, heater hoses, and an electronic ignition module on the outside of the distributor, I see nothing on that side, or even a flat spot to be stamped. Is is visable with the block fully assembled? On a horizontal (top of the block) or vertical (side of the block) surface?
 
Casting dates are tucked up under the exhaust manifold but you can see it. The pad on the front of the engine should accessible.
 
The machined surface the assembly date is stamped into is on top of block, in front of intake manifold, maybe under a/c compressor.
462465-aa0ee5514471c0a601bdceb57dabbfa7.jpg
 
69L48Z27 said:
Casting dates are tucked up under the exhaust manifold but you can see it. The pad on the front of the engine should accessible.
Click to expand...

Unless you have factory air and then it's a bitch to see it.
 
Okay! Now looking in the right spot (under AC compressor) scraped off some paint and voila! It says C440 and 8 31 HP. I guess this means August 31st and the car shows as shipped 9/13/66. Is the 8 31 supposed to be the engine build date or the car build date?

IMG_20171101_180518696.jpg IMG_20171101_180753603.jpg
 
I guess I need to crawl back under and see if the block casting under the exhaust manifold says 66. If so, I guess I can assume this is the original block.
 
So on to the transmission. Where are the numbers that would determine if it is the original? It is supposed to be also, but I never tried.
 
67GTX440 said:
Okay! Now looking in the right spot (under AC compressor) scraped off some paint and voila! It says C440 and 8 31 HP. I guess this means August 31st and the car shows as shipped 9/13/66. Is the 8 31 supposed to be the engine build date or the car build date?

View attachment 534865 View attachment 534867
Click to expand...
Getting close. Dates line up. No VIN or Julian dates on 67 engines.
67GTX440 said:
I guess I need to crawl back under and see if the block casting under the exhaust manifold says 66. If so, I guess I can assume this is the original block.
Click to expand...
so far so good
67GTX440 said:
So on to the transmission. Where are the numbers that would determine if it is the original? It is supposed to be also, but I never tried.
Click to expand...
Driver's side above pan on the 'rail' will have part numbers along with some other numbers. Take a picture and post. Casting marks will have dates also
 
Okay! I looked above engine block casting numbers on both side and cannot find a casting date on either side above the casting number. This is an RB block, which is why the engine pad was under the compressor rather than by the distributor. In the engine assembly stamping of C 440 the C indicates 1967. This must mean model year 1967 rather than calendar year the engine was assembled, since the car was shipped 9/13/66. The engine assembly date was 8/31, which had to be calendar year 1966. There is also a small 12 2 separated with a dot disappearing under the starter that is most likely the block date code. It cannot be read without removing the starter.
The transmission numbers are H2801541 and 8350656. The first number is the correct transmission ID for a Plymouth 67-68 B-440 H/Per. This transmission was only built for those two years. The first part of second number is the 10,000 day Mopar date code and appears to be missing the first digit 1 as many seem to be. 1835 would equate to 8/6/66 which would correspond with the engine build date and car shipping date. I believe the last four numbers 0656 are supposed to indicate transmission build sequence. This would indicate it was a Plymouth 67-68 early build.
Based on all this, I am guessing the original engine and transmission I was told when I bought the car is correct. I will check the date under the starter if I ever have the starter out.
Anyone that does not concur with these findings? I have had the car almost five years and had no reason to doubt the seller, but never bothered to check. I guess most owners would have verified this before they bought or restored the car.
 
The 9/13 "shipping" date did that come off fender tag? If so that's a product date. I'm not an expert on that it, the 9/13 might mean week of. Someone could chime in to clarify this.
 
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