Ken put more blocks out than I thought after I finally got mine, Almost a 2 year ordeal, block# 426-495, The machining was poor, the bores were to be finished @ 4.500 ready to assemble. I had to have the bores fixed to square them up.(They never used deck plates)The water passages were filled with aluminum chips. Any one ordering a block in the future get the bores undersized and let a reputable machine shop do the finish work. IMO