I hear a lot of bad talk with Indy cylinder head and others like them. I know they are arrogant. With me it's all about business. I've bought a lot of good parts cheap from them. Keep in mind It's just business. Don't rush. If you are not wanting to build your own engine, I've heard a lot of good things about MRL. Never done any business with them. They are a vendor on the site you can message about a build.