I don't mean to hijack this thread but i just read through Jmacs post and it got me thinking about the part where he mentioned about polishing all surfaces so the oil has less resistance to run back into the sump, i seem to recall another way that another member achieved that, he simply painted the inner crank area of the block-


Another reason he paints the inside is to seal the block, just incase a bit of casting lets go and does some serious damage. The paint he uses is just Dulux primer sealer.

Just something else to think about.