Thanks for the reply dave. Tried them but no joy, seems like this engines are very hard to find second hand bits for and new replacment heads range from £500-1500 dependeing on casting numbers and build level. Its a shame that whatever cowboy tried to get the injectors out last time smashed the engine to bits and bodged it to give it back to their customer! Seems like there is a lot of them out there sometimes! many thanks anyway.
Sam