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[C1] Engine stamp

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Old Jun 14, 2018 | 02:28 PM
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With all the discussion of Vin tags and engine pad stamps, I would really appreciate some comments on mine. I just spoke with the previous owner, prior to the dealer who sold the car to me and he informed me my car as a Muncie close ratio and not the T-10, as the dealer said. Might be wrong info as he only owned it for less than a year and I'll check it this weekend. Also, spoke with the previous owner of 15 years a few weeks ago and he made no comment about the tranny. Both say it has the original engine.

But, now I'm wondering if the engine pad looks like it's stamped correctly. Would appreciate some educated comments on it. Also, it looks to me this engine was built in mid December 1961.....is that what you see? My car was built last week of December 1961 with Vin of 104470.

Thanks,

Butch

Last edited by Dreaming60’s; Nov 20, 2022 at 10:49 AM.
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Old Jun 14, 2018 | 02:43 PM
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Butch, gently clean the paint off the pad if you want a real opinion. Characters can give us insight, but the pad surface is the total package on being able to determine what you have. Use soft rag and do not rub aggressively. Pad finish and broaching will guide a pro in an opinion. Regards. ARA
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Old Jun 14, 2018 | 02:47 PM
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Use lacquer thinner with the soft rag. Maybe a few Q-tips around the edges and letters/numbers.

Larry
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Old Jun 14, 2018 | 02:53 PM
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Thanks you guys! I didn't realize it was this intense about broach marks as such. I tried to rub the paint off after this photo was taken with a scotch bright pad but it just removed a little paint and I stopped. Is paint remover okay as long as i'm careful to not get it on any other surfaces. We use a special aircraft paint remover at our business and it seems to remove any paint in a minute.

Butch
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Old Jun 14, 2018 | 03:02 PM
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Originally Posted by 62cruiseer
Thanks you guys! I didn't realize it was this intense about broach marks as such. I tried to rub the paint off after this photo was taken with a scotch bright pad but it just removed a little paint and I stopped. Is paint remover okay as long as i'm careful to not get it on any other surfaces. We use a special aircraft paint remover at our business and it seems to remove any paint in a minute.

Butch
That should be fine. The lacquer thinner is probably just a bit more gentle..........

Larry

EDIT: I have actually seen folks use a quarter or a knife blade at NCRS events years ago just before judging to remove the paint. In a few cases the paint was recently added to help disguise the recent stampings.

Last edited by Powershift; Jun 14, 2018 at 03:05 PM.
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Old Jun 14, 2018 | 03:02 PM
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DON'T USE SCOTCHBRITE or sandpaper or anything other than a soft facecloth or t shirt. Anything abrasive may damage possible broach marks you may have. Soft cloth, lacquer thinner and patience. I wouldn't even put too much finger pressure on it while rubbing to be honest with you.
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Old Jun 14, 2018 | 03:09 PM
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Why not just leave it alone. You might get some bad news and cause you a breakdown. Besides, if you take the paint off, it'll rust.
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Old Jun 14, 2018 | 03:13 PM
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Originally Posted by MikeM
Why not just leave it alone. You might get some bad news and cause you a breakdown. Besides, if you take the paint off, it'll rust.

All that is true............

IF you remove the paint from the pad, then by all means use Vaseline or Prelube6 or engine oil or similar to treat the pad to prevent rusting. And then you get to do the same every 6 months or so afterwards.......especially if you live in high humidity area.

I am almost sorry I did it myself...........but now I have to live with it.

Larry
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Old Jun 14, 2018 | 03:15 PM
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Originally Posted by 93RubyRedCoupe
DON'T USE SCOTCHBRITE or sandpaper or anything other than a soft facecloth or t shirt. Anything abrasive may damage possible broach marks you may have. Soft cloth, lacquer thinner and patience. I wouldn't even put too much finger pressure on it while rubbing to be honest with you.
Holy Smoley, I do need to be gentle! Are broach marks struck into the pad or inked on? I know from the fellow who bought the car in early 2000's, that the engine was "supposed" to be rebuilt just before he got it. I have receipts for a top OH, but don't see any lower end work. Since the pad stamping is lighter (in my opinion) at the engine HP identification end of the number (RC, RD, RH, etc.) than the other end I wondered if the block maybe was decked.

Butch
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Old Jun 14, 2018 | 03:20 PM
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I'm prepared to take bad news. I just want to know for sure what I bought! If the engine isn't numbers matching, like it was represented to be, I'll just go another direction with the car and not worry about any modifications I do. Actually it takes the pressure off and the guilt of "maybe" installing R&P, disc brakes and other mods. The pisser is the dealer I bought it from should know better and most likely did. The truth will set me free.

Butch
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Old Jun 14, 2018 | 05:45 PM
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please refer to the previous post regarding “numbers matching” ......
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Old Jun 14, 2018 | 05:55 PM
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It's not fully dispositive of the issue, but have you checked the block casting date? If it's appropriate, that will help settle things a bit and if it's a later block, well, you'll know the answer....
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Old Jun 14, 2018 | 07:20 PM
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Paint remover and then lacquer thinner with paper towel. This isn't baby skin , it's metal.
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Old Jun 14, 2018 | 07:45 PM
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Originally Posted by 62cruiseer
Holy Smoley, I do need to be gentle! Are broach marks struck into the pad or inked on? I know from the fellow who bought the car in early 2000's, that the engine was "supposed" to be rebuilt just before he got it. I have receipts for a top OH, but don't see any lower end work. Since the pad stamping is lighter (in my opinion) at the engine HP identification end of the number (RC, RD, RH, etc.) than the other end I wondered if the block maybe was decked.

Butch
broach marks are lines left my the knives on the machine tool that surfaced the deck before assembly
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Old Jun 14, 2018 | 08:39 PM
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The timing of the mid December casting and late December assembly is about right.
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Old Jun 15, 2018 | 04:47 PM
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Okay, need to pick up some lacquer thinner tomorrow and I'll clean off the pad. Found the block casting number of 3782870 behind the L/H head and believe it means it is a 1962-65 327, but where do I find the 3 digit casting date number? I also found a 12: above the starter, but not sure that means anything.

Butch
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Old Jun 15, 2018 | 04:56 PM
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I swear i think i see some evidence of a double strike on your pad under the paint.....Call me crazy (and i've been called worse) but i think i do.....ARA
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Old Jun 15, 2018 | 04:58 PM
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Originally Posted by 62cruiseer
Okay, need to pick up some lacquer thinner tomorrow and I'll clean off the pad. Found the block casting number of 3782870 behind the L/H head and believe it means it is a 1962-65 327, but where do I find the 3 digit casting date number? I also found a 12: above the starter, but not sure that means anything.

Butch
The date code is on the opposite side of the block where you found the casting number
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Old Jun 15, 2018 | 05:00 PM
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Originally Posted by 62cruiseer
Okay, need to pick up some lacquer thinner tomorrow and I'll clean off the pad. Found the block casting number of 3782870 behind the L/H head and believe it means it is a 1962-65 327, but where do I find the 3 digit casting date number? I also found a 12: above the starter, but not sure that means anything.

Butch
Glad you found the 3782870 engine casting code. You then know where it is on the LEFT UPPER side of the engine block. Well the engine casting date code is in almost the same spot on the RIGHT UPPER side of the block. It should be a LETTER NUMBER NUMBER type code: like L 10 1 which stands for December (L) 10th day (10) 1961 (1).

You may need a rag to clean area and a good flashlight. Engine casting month COULD be a J or K for your car as well as an L. Look carefully.

Good luck.

Larry

Last edited by Powershift; Jun 15, 2018 at 05:03 PM.
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Old Jun 15, 2018 | 06:12 PM
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Just looked and that will require the removal of the PCV breather tube, so another tomorrow job when I take it down off the race ramps. Just confirmed it does have a Muncie, so no matching numbers T-10, like it was represented. Not going to be a judged car and from what I've heard the Muncie is a better transmission, so decisions are getting easier.

Changing the topic a little, but is there any way to tell from the outside if I have a 2:20 or a 2:54 tranny? Maybe I should start a new thread?

Butch
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