Mine on standard airbox still which must be rare, an engineer mate has my carbs now and is going to have a look at them, if they are too far gone I’ll by flatslides and put individual K&N’s on them.
Obviously I’ll need to get them set up, I’m so out of touch with it all I don’t know how’s about still, I’ll have to Google names, I did use to use PDQ in Taplow near Slough.