They had to pound in a good bit where the steering shaft was rubbing. They also had to reroute and bend the oil dipstick. They bolt straight up to the block. Then they made a custom Y-pipe. I think there were other places they had to pound and bend to clear the strut towers...all in all nothing a good shop couldn't handle.
Just talked to a high performance shop here. Said they would custom build me some stainless steel headers with the air tubes for $2k. Thinking I may go this route as they would be high grade, warranty and made for mine specifically.