Cumins did not cast the blocks, they had a contract with Mopar to assemble engines. My first engine build when I was 17 had more attention to detail and clenliness than Cumins put into the 528 that I bought. Nothing wrong with the block other than they over-honed it till a set of new filefit rings had .028 gap out of the box. If Indy did the build, I would have think that that it was done right.