[quote pid=1324 author=bushyg40 date=1210628953]anyway any comments welcome
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If your doing all that work on your head, then I recomment changing the valve guides as well as the stem seals, (I say this as my guides where badly worn on close inspection and the valves stems themselves had taken a harmering too(so new valves all round too).
Can't tell much from your pic's (if you can resize them would be great), but when I did all my head porting work, I used an old gasket to act as a template and therefore matching each head port with each manifold port thus creating a smooth transition between the mating parts(in my opinion thats inportant than getting greater diameter). Generally I found that the exhaust manifold(PSD) and the GT inlet manifold that I fitted were both larger bored than the G40 head, but port offsets were different so matching edge with edge is crucial.