Porsche 3.6 litre Mahle Head Gasket Repair Kit

[Baltic964]

Hi,
I shortly starting a stock engine rebuild on a 1990 year 964 3.6 litre M64-01 engine.

My engine does not have the head gasket modification so I would like to include the later engine modification in my rebuild.

Does anyone know the Porsche OEM part number on the Porsche 3.6 litre OEM Mahle Head Gasket Repair Kit that includes Barrels, Pistons, Rings

Suggest a brand of competition racing grade valve guides as I want to rebuild the engine with better than original Porsche OEM valve guides, Please provide the part number so I can cross check is the correct for my engine up-date.

Regards, Mark