1967 or 1968 Camaro SS 160 mph Speedometer???

[LeMans Blue X77]

I just bought a car which the guy claimed it was a 67 RS/SS.
there is no cowl tag.
But to my question, it has a 160 mph speedometer on one side and a plain gas gauge on the other.
It looks to be factory but I'm not sure. Can someone help?
see pictures attached. http://www.yenko.net/ubbthreads/images/graemlins/confused.gif

[oboym]

160 mph its from a firebird.

[LeMans Blue X77]

Thanks

I'll just ebay it then.

[Supercar_Kid]

The existence of the stock 160 MPH Firebird speedometer makes Yenko's COPO 9737 140 MPH speedo seem all the more strange to me. Why did Yenko feel it was necessary for his 68-9 Camaros get 140 MPH speedometers? Why would GM design and tool up to build a Yenko specific speedometer for the '68 Camaros when a Firebird already had a 160 in place? Seems if it was already calibrated for a Firebird, adapting it to the near mechanically identical Camaro would be the obvious easy and cheap route. Perhaps a reducer would be necessary for the 4.10 gears but I think any 4 series geared GM car used these anyways.

It just doesn't add up to me, why GM and Yenko Sportscars, both well known for their frugality, would deem necessary, and ultimately design and implement, a COPO only 140 MPH speedometer in the Camaro, especially in '68 when a Firebird 160 MPH unit would bolt right in. What was GMs logic in giving the Firebird a 160 speedo when Camaros only got 120s? Was it a perceived performance/marketing thing, or was there more to it than that?

I've heard the argument that it was Yenko's SCCA background that may have sparked his idea for the higher Camaro speedo being a necessity, but I don't know any road racers that stare at their speedo, and a lot of racecars don't even have them. I doubt looking down at a buried 120 would bother them anyway, does that last 20 MPH make all that much difference? Any ideas?

[Unreal]

I thought Chevy just put a 120 speedo and a 160 speedo in a bag, and shook them really well. Then pulled two 140's out of the bag. Or is that just a myth?