while it's all in bits u may aswell have the head looked at see if the guides need changing and also replace the Stem Seals get the job done right and replace all the top-end Gaskets.

Just brought my Group A Head-Set from WoodFord Garage £200.00 and it'll include everything you'll need.

Oh if ya still after a Standard Airbox i've got 1 taken off my 4x4 Sapphire