vauxhall astra1.4 55plate mk5 petrol.sxi

[als]

hi can any1tell me if a vectra1.8sri petrol will fit into an astra1.4??both55plates??? if so do i need anything to add??i.e driveshafts..dwnpipes???any advice-appreciated???or wheres best place to get cylinderhead skimmed/head gaskets/stretchbolts...ect.ect....
appreciate any advice