Well, my story, looking for a decent 427 block. Over 1 year looking, buying one, just to find out, I should have passed on it. Ended up buying a BBM. All the blocks, marine, center or side oiler, all needed machine work, and a sleeve or two. Yes and the least expensive one was asking $2500. I bought it but it was in need of a couple more sleeves. So on the advice of the machinist, I sold it, (got $575 for it). I did find a nice standard bore marine block for $ 3300. It would have cleaned up at .010 over, but then I was basically at the price of a new BBM. The gentleman did eventually sell the block. Looking back ,I am glad to have the BBM block. ( I looked at probably 12 blocks, so good luck to you )