Hi everybody! This forum has been a fantastic source of information for the first-time porsche owner! I need to change the timing chain guides on my 72 911 t (euro). From what I have read,(Bruce Andersons performance handbook.etc.) there are 5 black(pt#911.105.222.06) and 1 brown(#911.105.222.05). When ordering the parts from the Porsche dealer, I was told that there is only 1 type,being the brown for all 6. Does the brown ones now supersede the black? can I use the brown in all 6 places? Any help here would be greatly appreciated. Thanks.