what cam for 1.8 head

[leebo]

hey, im gettin a nova with a 1.8 8v big valve head from an astra mk 1 GTE on top of a 20seh block. i wnat to change teh cam anyone got any recommendations? would cams form other heads fit the 1.8 or am i restrcted to one cam. if anyone can point me in the right direction on what im lookin for it would be great.
cheers lee