smf can be fitted no ??
I wouldn't touch SMFs with a barge pole if you don't want vibrations entering your car. Even if you can cope with the vibrations they are not very healthy for the gearbox!
In response to the OP, check the response of the turbo for failure, i.e. the usual tell-tale signs of failure (oil consumption, smoke, unfamiliar noises, etc.). Oh, and the common and well-noted PD150 'chocolate' camshaft
can affect PD130s too (even if some disagree or if it isn't a common fault for those engines), so if you are able to, whip off the cam cover to check for signs of wear and tear. If so, walk away, or budget at least a grand for repair!

Finally, make sure the cambelt has been changed as per service history.