Author Topic: W72 400 VIN Authentication  (Read 288 times)


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W72 400 VIN Authentication
« on: December 08, 2019, 02:19:58 PM »
Hey all,

I'm trying to verify that my engine is the number matching engine for my Trans Am.  It's a 1978 Trans Am, and the VIN does identify it as a 400 car.  The cowl tag doesn't specify that it is a W72, however in the attached picture you will see that it is stamped X7 indicating a 1978 W72 400 Automatic (my car is an auto).  If you look at the second picture, the spot where the VIN would typically be stamped near the timing cover and oil pan is blank.  Is there any other place that this may have been stamped or has it just simply worn off over time and I'm SOL as far as identifying the engine as numbers matching.  The third picture is of what was stamped around the corner of the block from where the VIN should be, not sure what the numbers mean but I'm posting it just in case they are relevant to this whole situation.

Thanks for any help y'all can offer.




Y88 TA

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Re: W72 400 VIN Authentication
« Reply #1 on: December 09, 2019, 09:00:19 AM »
All I can suggest is maybe take some steel wool and try to clean up or shine up the vin# area better. Maybe some #'s will start popping out at you.


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Re: W72 400 VIN Authentication
« Reply #2 on: December 09, 2019, 09:21:40 AM »
They might have put it under the timing cover, but they might not have done it at all either.
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1977 Y82 4-speed (red interior)
1978 Skybird 350
1978 Redbird 305
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1992 Lincoln Mark VII LSC/SE (red)
1970 Datsun Pickup
1953 Chevy pickup (converted 4x4)
1988 T-bird Turbo Coupe

Re: W72 400 VIN Authentication
« Reply #2 on: December 09, 2019, 09:21:40 AM »
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