Pull some bearing caps and see what they look like. Eminently possible that the 'copper' is bronze from the bearing shells which have worn through the white metal.
Had a look at one of the main bearings, and although it showed a small amount of wear, it looked pretty good to me. Ill try and have a look at the big ends. does any one know of an oil flow diagram whitch bigg end is furthist from the oil feed?
Big ends in good condition, probably better than the main bearings. Hard to even tell they have been used . fell much better about that now still not sure about the copper stuff though.
Still no progress and the Fc is staring to turn green and look very sorry for its self. The sun is shining now though so may be i can summon up the enthusiasm to get out their and do some thing.