[cobrashoch]

I just seen a bowtie block that had so much core shift that when boring it perpendicular to the crankshaft centerline a .080 boring was not enough to set things straight. The block was junk, so we sleeved it and my buddy sold it for truck use.
As a side point, ANY performance used block should be sonic checked. I've seen too many odd ball things happen when boring a block I guess.
cobrashock