Inliners International Forums General Discussion Blown and Injected want to turbo my 230 I6. 15k mi. on stock rebuild

You will need to consider installing larger valves and a performance valve job and install the bolt-in lumps into the intake ports and some mild porting. The camshaft would need to be selected and ground for use with a turbo and many companies want to know what intake and exhaust port flow the head has to better match it for your needs.