VIN vs. Fisher body # on cowl tag correlation???

[JHS]

I heard from a guy who heard from a guy who..., well, you know, that GM VINs typically are within a 100 digit spread of the Fisher body number on the cowl tag, a possible way to make sure the cowl tag goes with the car. I compared these two numbers on my 67 Z28, 69 Impala SS, 70 Nova SS, 70 Camaro RS/SS and 68 Buick GS 400. Guess what? They all fell well within the 100 digit spread, the farthest off being 35! Has anyone else heard of this or am I just a novice late comer to the hobby? Is this a good way to verify a car's real cowl tag?

[Chevy454]

Nope...!

[JHS]

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Nope...!

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Does this mean it is not a good way to verify or that you have not heard of this before?

[JHS]

Clarification: one only compares the last 3 digits of each set of numbers.

[Chevy454]

Both...never heard it before, and it's not a good method...

[JHS]

I realize it is not a proof positive method but it sure was strange to find that my cars all fell within the parameter indicated, noting that only the last 3 digits of each set of numbers are used. Just wondered if this applied to other members cars?

[Chevy454]

My guess is it's gonna be more of a coincidence thing as the VIN and body # were 2 different entities? Fyi: I grabbed a page of COPO Chevelle #s, and out of the 10 on that page, only 1 of them worked out to be within 100...

[Don_Lightfoot]

I also have not heard of any type of correlation between the two, wish there was. As a matter of interest the difference on my Chevelle is 76 (264 vs 188).

[Denis]

I think you should tell us about your 67 Z28...

[JHS]

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I think you should tell us about your 67 Z28...

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Butternut Yellow w/std. black interior, black vinyl top, console w/out gauges, factory original drivetrain w/MO code block, restored in the mid to late 90s w/lacquer paint, just certified by MacNeish and car #170 in the registery. I meant to post this thread in the general discussion forum, sorry.