I pass all yours tips, see what comes up. That is third time in 2 years I rebuild engine. First damage engine it was my foult. Second, the blody painter ad some sand to the engine. So I start again from scratch. Got some bits and bobs laing allaround. Like: Dot head- ported RS 38- bit tired - revs hanging Ti headers 42 dia But I'm not sure going same road. From one hand I have standard healthy b12 engine. From the oder hand I want do that you know power and glory. What I won't achieve is proper bottom power, and of course some on the top. What I have to lose? hmm destroy third engine... What you will do?