Well then I would say it is OK. Old landy 2 1/4 engines do not have modern stuff like EGR [ exhaust gas recirculation ] or particulate filters. the most you get on later ones is crankcase gas recirculation. Put an extension on the pipe past the body a couple of inches or angled for down .
I second the use of an angled extension. I put one on mine just to get the filthy diesel fumes further away from the cab and prevent any being sucked in, it really helped. And if you point it down you won't see the colour and not worry about it.