Re: Mecum Auction 68 L89 Camaro
 

That guy is smart.((( Dont restamp vin numbers)). Ask a few ohio dealers( mid year corvettes) about that.

Re: Mecum Auction 68 L89 Camaro
 

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: TimG</div><div class="ubbcode-body">Of course, there are some &quot;virgin&quot; over the counter blocks that have original broach marks. These would not have to be ground to stamp them. One well known 67 L88 that lost its motor has a correct build stamp long block in it. The person that had the car restored years ago chose not to stamp the VIN on the block. </div></div>

yes, I have a correct dated virgin NOS complete 67 Z28 302 with the broach marks and date code and MO stamp for my 67 Z28, It has never been stamped with a VIN. (and never will)...
....those types would be hard blocks to tell a non-original Vin stamp if done correctly... [img]<<GRAEMLIN_URL>>/dunno.gif[/img]

Re: Mecum Auction 68 L89 Camaro
 

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: iluv69s</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: TimG</div><div class="ubbcode-body">Of course, there are some &quot;virgin&quot; over the counter blocks that have original broach marks. These would not have to be ground to stamp them. One well known 67 L88 that lost its motor has a correct build stamp long block in it. The person that had the car restored years ago chose not to stamp the VIN on the block. </div></div>

yes, I have a correct dated virgin NOS complete 67 Z28 302 with the broach marks and date code and MO stamp for my 67 Z28, It has never been stamped with a VIN. (and never will)...
....those types would be hard blocks to tell a non-original Vin stamp if done correctly... [img]<<GRAEMLIN_URL>>/dunno.gif[/img] </div></div>

I've already begun the process of setting up some experiments. I'll add this scenario to the list. Perhaps we can figure out a technology to &quot;date&quot; a stamp. A 40 yr old stamp may appear different under certain conditions than a 5 yr old stamp? We'll stamp virgin iron and see if we can detect a difference.

Re: Mecum Auction 68 L89 Camaro
 

Not that I would know anything about this.....But....In the old days (Mid 60's).....If the Police thought you had a engine in your car that was restamped with new #'s......they would heat up the number pad with a torch and then apply acid of some type......if the pad were messed with....the old stampings #'s would somewhat come thru.........Just Say'in.....

Re: Mecum Auction 68 L89 Camaro
 

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: kwhizz</div><div class="ubbcode-body">Not that I would know anything about this.....But....In the old days (Mid 60's).....If the Police thought you had a engine in your car that was restamped with new #'s......they would heat up the number pad with a torch and then apply acid of some type......if the pad were messed with....the old stampings #'s would somewhat come thru.........Just Say'in..... </div></div>

Thats the process Im talking about..im sure the police use it on guns that have numbers tampered with too...I also saw a vette for sale a few years ago(maybe a 67 L89 or L88?) that had this process done to the block and the frame if I recall..?? to prove it was never restamped..?

Re: Mecum Auction 68 L89 Camaro
 

And if the numbers are not messed with, does this process of heat and acid ruin the original numbers???

Re: Mecum Auction 68 L89 Camaro
 

Yeah - like I said, the stress created by the original stamping could cause a slight distortion in heat propagation. It's not like a weld where the specific heat of the base and weld material is actually different (and shows more dramatic temperature differential). I'm not a PhD though - just bach. &amp; mast. in material science. I'd love to see it work!

Re: Mecum Auction 68 L89 Camaro
 

What I'm told will be observable is a difference in the rate of cooling. I guess the science is that the iron beneath the stamp has been altered (density maybe?) as a result of the original stamping and will therefore cool at a rate different from that of the surrounding iron. He actually thinks he may be able to discern a newer stamp from an older one. We're going to do some experiments and I will post results. Initial meeting Thursday.

Re: Mecum Auction 68 L89 Camaro
 

Instead of going through all this,why not just ask the owner about the history of the car?






[img]<<GRAEMLIN_URL>>/wink.gif[/img]

Re: Mecum Auction 68 L89 Camaro
 

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ZiggyL78</div><div class="ubbcode-body">Instead of going through all this,why not just ask the owner about the history of the car?






[img]<<GRAEMLIN_URL>>/wink.gif[/img] </div></div>

I think they are going to test other motors for future comparisons. I dont believe they have access to the car in question..or it's owner at the moment. And most of these cars do not have verified owner history. If so, that would most likely be publicized in the ad.