tim the toolman

Hi There, I have a 1999 UK Turbo! I need a left hand cylinder head c/w inlet cam. I have a 2.0 turbo legacy engine and a 96 turbo impreza engine, both which have heads with the four 'inlet manifold to head' bolts in-line!, i run a 98 UK turbo which also has them in a line! The 99 i am repairing has the inlet to head bolts offset!!!! (the centre two are further out). Is this from 99 models onwards and does anyone know what year heads will fit? (are the new shape the same?) Any help much appreciated,(i didn't realise there were so many EJ20 variations!). Cheers, Tim.