Hay guys could some one lead me in the right direction , I have a TB 45 with a garret turbo stuck to the side of it placed in a GQ wagon , the patrol goes great but the compression from the standard motor is to high and pings every now and then I am running 9 pound max (with a modified fuel rail and injectors, it also has 42 rods for added strength) but want more . I have to remove the head due to oil leaking from the front of the head and block , what might be the best way to reduce the compression : thicker head gasket , do some head work , or maybe looking at different pistons and where could I start looking , I am from Adelaide

cheers
ready to pop !!