Lost,
Roscoe is right on.
Hoffman Machine is one of the premier builders in the country (I like Keith Craft too). One thing, a real builder is not going to give up all the components of a successful build. They shouldn't either. It's why us guys go to them in the first place. Because they know.
I love my Performance Engineering 418, anyone that knows me, knows I would not say it if it was not true. You can use PE without issue. So there, I plugged my builder. He deserves it.
Okay, the Dart block is a great build for 500+ HP, and I was about 3 months behind the curve, or I would have one. It makes a nifty 427!
Best thing to do (unless you build motors for a living), is to have someone who knows what they are doing build your 500+ hp anvil. It is a more specific build, and needs to be built for a light car too.
IMO
Eric