Sorry guys I've been in the garage all day. I suppose detonation could have helped them along as I said the timing chain was going out of it, for quite some time I suspect. I kept thinking that I was having carb and distributor problems (which I was) but mostly it was the timing chain.
All of the bearings were were pretty much worn the same: top bearing half, copper showing through the whole width of the bearing. I didn't think to measure them and there in the trash now. I'm throwing a 350 together and hope to have it done tomorrow but since I quite so early tonight I doubt that will happen. The wife's kinda been on me! Well thanks for all the replies. I'll try and post some photos of the "new" 350.