Engine stamp pad help

[Ron H.]

I am looking at a 66 427/425 car with a Nov. 65 build date. Here is the the engine stamp pad.

Any feedback on authenticity based on appearance would be appreciated.

[Patrick H.]

Re: Engine stamp pad help

Some of those "broach marks" aren't parallel, which "suggests" that they may have been added after the engine left Tonawanda.

[Ron H.]

Re: Engine stamp pad help

Thanks Patrick

[Tom H.]

Re: Engine stamp pad help

I am only a hobbyist and by far no expert, but I don't like this stamp or broach marks. Of course, my opinion is worth exactly what you paid for it.

[Mike G.]

Re: Engine stamp pad help

i have seen much worse. i would have to see it up close.

[Patrick T.]

Re: Engine stamp pad help

I thought the VIN was gang stamped with the heads already installed. If this is the case, I don't see how the guy doing the stamping would have enough room to get the number on the left high enough to stamp it where it is shown below. It seems the stamp in question was stamped with the head off the block. PT

Photo courtesy of Michael Hanson.

[Joel F.]

Re: Engine stamp pad help

Patrick Tighe,

The assembly stamp for BBCs was done before the installation of the heads at Tonawanda, while the VIN stamp was done at St Louis. In this case, the assembly stamp appears to me to be in the correct position, as does the VIN. That said, I agree with Dr Hulst that the broach marks are not typical.

[Ken A.]

Re: Engine stamp pad help

It would appear to me to be an original stamping. it would appear during the rebuild (all big blocks were rebuilt at least once) that the block deck was scuffed with a cleaning pad and the broach marks were altered or destroyed, my opinion FWIW.

[Jay G.]

Re: Engine stamp pad help

I am looking at a 66 427/425 car with a Nov. 65 build date. Here is the the engine stamp pad.

Any feedback on authenticity based on appearance would be appreciated.

I like the fading on both the 5 and top part of the 6 on the Vin. Suggests age. But again requires someone more exp. Better looking stamp than some I've seen passed off as real.

[Richard E.]

Re: Engine stamp pad help

The 9 in the assembly date looks different than what i have seen....
But remember free info is usually worth what you pay for it

[Ronald L.]

Re: Engine stamp pad help

Was this Theory of Physics 101 - two atoms cannot occupy the same space? I think it applies here in the stamping process.

So what you get in a stamp process, and a re-stamp of a decked block is ... metal displacement.

When you make the hit metal has to go somewhere, like a meteor crater, mass is displaced.

In the case of stamps it bulges at the edges of the letters.

This pad is lacking that detail, which could be rationalized that the rebuilder was told to save the pad and he did. He just was not told to --- not touch it in any way, shape or form.

I cannot comment on the number 9 as I don't have any of those archived but the rest of the numbers and the VIN look like originals if you take into account this skimming of the surface.

fwiw...

[Jay G.]

Re: Engine stamp pad help

Was this Theory of Physics 101 - two atoms cannot occupy the same space? I think it applies here in the stamping process.

So what you get in a stamp process, and a re-stamp of a decked block is ... metal displacement.

When you make the hit metal has to go somewhere, like a meteor crater, mass is displaced.

In the case of stamps it bulges at the edges of the letters.

This pad is lacking that detail, which could be rationalized that the rebuilder was told to save the pad and he did. He just was not told to --- not touch it in any way, shape or form.

I cannot comment on the number 9 as I don't have any of those archived but the rest of the numbers and the VIN look like originals if you take into account this skimming of the surface.

fwiw...

Here a photo of my replacement over the counter 396 Block for reference.
I know as a I bought the 67 Chevelle SS 396 13867 car from org owner. Who purchased and buildt this block for racing his car in Fall of 68 Winter of 69.
We since put back org. 406 Block. The broach marks may give a read.
As No one magically stamped the Vin. This case for Chevelle 69 396/350HP Sorry a 272 block.
NOT 67 400 hp Corvette block If only it was...

[David S.]

Re: Engine stamp pad help

The character font is completely wrong. The IP stamp is off, the 6's are off as well as the 0. Not to mention the broach marks. I say re-stamp.

-Dave

[Ron H.]

Re: Engine stamp pad help

Here a photo of my replacement over the counter 396 Block for reference.
I know as a I bought the 67 Chevelle SS 396 13867 car from org owner. Who purchased and buildt this block for racing his car in Fall of 68 Winter of 69.
We since put back org. 406 Block. The broach marks may give a read.
As No one magically stamped the Vin. This case for Chevelle 69 396/350HP Sorry a 272 block.
NOT 67 400 hp Corvette block If only it was...

Is it typical that a stamping is not completely horizontal ?

[Jay G.]

Re: Engine stamp pad help

Is it typical that a stamping is not completely horizontal ?

Don't Know.
But this block's for a Chevelle. Maybe back in the day not as much attention paid to "Over the Counter block"?
Note No CE. He bought through Marhoffer Chevy Dealer whos still in Business.