well just got off the phone with DSS and they said that the level 10 and 20 blocks are standard production blocks that go over 35 cnc blueprinting operations and all threaded oil gally plugs, thread in freeze plugs just like the Boss 302 blocks for stronger reinforce sides. The bores are CNC 60° offset chamfered to improve air flow. They also said that they use stuff that normal engine machine shops don't use or can't find. They said level 10 is capable of handling 600 hp and the level 20 capable of handling 675.
yeah, thats great, but how long will that last.
when I asked them about what stuff they use that machine shops don't or can't find. They wouldn't give me an example. Not sure why, either its bogus or they feel I would probably tell the machine shop and then they could use it to. Hmm, oh well.
Hope this helps.