Nice Pair Of..................

[P.J.]

Why would NCOA deck a perfect original block to a really rare car before exhausting all avenues to find the orig car.Or leave the orig stamp on the motor in order to someday find its orig car.
That does not make any sense to me. Am I missing something
PJ

[olredalert]

------Was that restamping under Marks watch??? I am as amamzed as anyone.........Bill S

[Stefano]

That is just crazy Restamp an original Z16 Block??? I have many original blocks belonging to special cars and they will never be restamped while in my custody.

[MosportGreen66]

Restamps dominate the hobby today (Corvettes especially)

I think a restamp can be used in two fashions... 1) a way of falsifying a car, to make the motor appear original or 2) a final touch on the restoration to bring it one step closer to its original condition with no intent to deceive.

As long as the motor is described as being original or not, I see no issues with a restamp. Personally, I'd never own a car with a restamped motor, but each to his own.

[njsteve]

The saddest part of all is that if a block is decked, you can still get a photographable image of the original stamping through employing basic crime scene technology. But once you restamp it, you have lost that opportunity forever.

Crime scene techs lift serial numbers all the time, finding ground off serial numbers from stolen firearms, machinery, engine blocks, etc.

If you have a decked Chevy block I would recommend contacting your local police department and ask them who processes their crime scenes for serial number evidence. The guys that do the number lifting are always looking for some realistic iron to practice on. You really have nothing to lose - if they can't lift the numbers, you're still in the same spot as you were before. And if you do get the numbers lifted, you have just added immeasurably to your car's value.

[iluv69s]

[ QUOTE ]
But once you restamp it, you have lost that opportunity forever.



[/ QUOTE ]

Why is that?? I would think the original stamping is still in the block and can be "lifted" from the deck whether its been re-stamped or not... But Im no expert, thats for sure...

[njsteve]

The basic principal is that when metal is stamped, the stamp compresses (stresses) that section of metal in forming the visible image of the letter/number. Decking the block removes a thin layer of the metal but does not relieve the original stamped (stressed) area. Therefore, by using a heat process or acid and electricity process, they can get a ghost image to appear on the surface of the metal that appears for a long enough time to photograph it. If you stamp over that area, you altered that preexisting compressed area of metal and destroyed it.

Here's some light reading on the subject:

http://lucy.mrs.org/2006brazil/wedpix/j502.pdf

http://cms.ucok.edu/chemistry/Vonmin...%20Lecture.pdf

[jeffschevelle]

[ QUOTE ]
Why would NCOA deck a perfect original block to a really rare car before exhausting all avenues to find the orig car.Or leave the orig stamp on the motor in order to someday find its orig car.
That does not make any sense to me. Am I missing something
PJ

[/ QUOTE ]

It was not NCOA or Mark that decked and stamped the original block to #54. It was someone who owned it after it was given away by NCOA (either the winner or a subsequent person).