C3 underside pics.

[Chuffer]

The early cars had solid mounts with no rubber.

Does that mean your fillings rattle ?

 

[Mr. Cricket]

Shouldn't imagine there would be too many Vettes (or any other UK based American cars from this period) with smog gear still intact and useable. It has never been a legal requirement on cars in UK from that time so most people would have junked-it.

If they were race cars I'd take it off or plug it but they're not so it stays. On the yellow one it was missing but I managed to find replacement date correct parts..