.48 housing will need to go and a .63 required (although this will be still pushing your turbo to its limit!)greys will be fine!hosepipe and borewash is nothing to do with the injector all down to the mapping!or seimens 55lb will do!thats about it on what you have!standard camshafts can do 400bhp i think!also you will need a grp A fuel pump and coil just to be on the safe side!what inet plemun have you got?