Hi.
That actually sounds about right. I am assuming all those parts are new or rebuilt / reground. They should be able to give you an estimation of power, IF they know what they are doing. It sounds like a very nice combo for a "Streetable" Grey with a nice note & extra get up & go.
Do NOT expect a Grey to throw you into the back seat, unless you spend the big $$$ & go for Rare bolt on heads, blowers, injection etc. That is also when you need to start looking at steel cranks etc. That is also the time you start hiding the bank statement from your missus
I am guessing you are from Tassie? North or South? I am Hobart based & can help out if you need.
Rob J