I haven't bought an Indy block myself but I've talked to a couple of shops who do buy them. They buy unfinished blocks from Indy since they found out that they needed to re-machine all of the critical surfaces anyway.

The local shop I work with uses a lot of Dart blocks for Chevy circle track engines. The Dart blocks seem to be ready to go out of the box for the most part. They all get checked over but usually they are right.

I'm looking forward to getting my hands on a KB block in the near future. I think the new team there will have the capability of sending out blocks which are finished properly.