smoker

[Beany-s12]

i bought my s12 with a knocking bottom end and was smoking! changed the bottom end and she still smoked but lived with it! thinkin it must be turbo i got a t25 and fitted it but its smoking but is now getting worse especially after i've given it a thrashng! its got a new head gasket from when i did bittom end and the bloke i got the car from said the head had been fully rebuilt with new seals but he reckons he ported the head himself to the size of the gasket!
does anyone know if there is an oil feed in the head near the ports that he might of got too close to or if there might be anything else i should look at before rebuilding my spare head and swapping them over?