mopar ebay engines?

Do you research. From a past experience I would say find a local builder and have them do it for you. I am a body man by trade and wanted to buy a "crate" engine as I don't have the knowledge to build my own. I looked into the same engine you listed and found this...

Beware! 572 Hemi on eBay by Gozzy or Gosselin Motors ( gozzymopar )

I then contacted a "well known" Mopar engine builder. We came to an agreement and I shipped him my parts. Everytime I called him for some questions I had he got immediately pissed off and offended that I would ask him questions. In the end he flaked out, stole my parts, and sold them on ebay on the engine he was building for me. I never brought his name to light but maybe should have.

Find a local reputable shop that you can have build the engine for you. You can walk in, check on it, ask questions, and KNOW what you're getting.