Don,

Cheers for the advice.

I have run it through, one thing stands out to me.

The engine hasn;t been under any load, she's been on a stand picture somewhere in here. She has only been spinning the flywheel so there wouldn;t be much to say the crank is bent.

I have also found something very, very interesting.....

The conrod bearings from stewart wilkins motorsport have much smaller oil holes than the NOS ones I found stashed here. SO i'm thinking there might just be a volume (lubricating) issue there.

I have taken pics of the bearings.

Anyhow the knock is still there. I am going to have to give in and call in the expert, my old man (which I absolutly hate doing!).