5.7/6.1 hemi engine builders

Its the machine work and blue printing is my concern. I used to work at one of the best machine shops in western Canada but they have never done anything like this. I am sure they are quite capable but are expensive. Plus they are very busy building 360/410 sprint car engines, Nascar Canada engines and old style big and small block stuff. I was there for 7 years and never seen a new Hemi or a LS engine. Thats why I was looking at Indy cylinder heads till I seen some bad reviews on yellow bullet forums. Has anyone actually bought a crate engine from any of these builders?