Not the intake. I was talking about Solisimo's old post not recommending shorties- exhaust headers. Unless you have an oxy-acetylene torch and a few extra hands, no way to remove exhaust manifolds and install any kind of header on a ten year old Expy in 15 minutes. Don't think you meant that, right? Never being driven in the rain, no constant hot/cold condensation, or having stainless fasteners would make the job go quick. But then only on 2V,1rst gen Expy's, where you can actually get to most of the exhaust manifold bolts through the wheel well.
Don't know if the layout on 2 valve, 2nd gen's makes it easier,
but my '05 three valve is crammed in there.