Magnum Exh manifold machining.

You are taking it wrong. As far as I'm concerned, these guys that say "they can't do it", really can't do it. I do not see how a real machinist couldn't do that simple job. Now if they are just lazy, too busy to bother, are in some kind of a union, or it's against someone else's rules, then it's actually "won't do it". You originally asked about skill level... "is it really that difficult?" , so I thought that was where you were coming from. Lack of skills. Find a small shop that needs the work, or like Professor Fate said, maybe a technical school.