yea you'll need to get cut outs to run bd14s mate, its a good idea anyway for what it costs as it gives u or anyone else if u didnt run bigger cams the scope to in future. I did the same!! but am still running standard cams at mo. Skimming the wire rings out thou hummmm think a fwe people on here in the past have said they have left the ring holes with no problems, also what headgasket are you going to use btw?!

Shells wise guess its up to u if u want to fit new ones or not, obviously if their not worn at all probably dont need changing but then how many miles have they done now?!