Carburettor insulators

[Big col]

Can anyone advise if insulators were fitted to cars between the carburettors and the manifolds on PVT models. On many if not most post war cars with SU's carbs, an insulating spacer was fitted to stop heat transfer and vaporisation. I have had the carbs refurbished by Burlen but no such items have been supplied with the gasket sets. The car had no spacers to start with and I think this is correct.
If someone can confirm it would help the cause.

Thanks

Colin.