As the BBK intake has large coolant passage openings, it's a nice touch to trim excess gasket material when fitting the BBK intake. A hammer and chisel make fast work of this. It's also smart to glue the gaskets to the cylinder heads because they tend to shift when installing the lower intake.
Reaching the PCV area is nearly impossible with the BBK lower installed on the engine, so fit the PCV "basket" filter and the supplied long-hosed valve to the lower intake before installing the casting on the engine.
Thanks to just that much extra height and the inevitable hoses, wires, pipes, and things getting in the way, achieving the classic, straight-down lower intake manifold installation is difficult. So, while you can lower this intake yourself, a helper is a good idea. From there, dressing the intake with your fuel injectors and the BBK fuel rails follows standard procedure. It's easiest to fit the injectors to the fuel rails, then the assemblies to the lower intake. The rails bolt to the lower intake in the usual fashion.
Dressing the upper BBK intake is most easily done on the bench. One thing to remember to do is reclock the EGR valve when transferring it onto the new upper casting. As is, the electrical socket will face the manifold, making connecting the wiring harness impossible. It takes only a minute to reclock the EGR valve's position sensor, however.
There are no hidden bolts or tricky hardware between the upper and lower BBK manifolds. Allen-headed bolts are supplied by BBK, and an Allen socket or T-handled wrench does just fine.
One of the few concessions to our nearly production manifold was a lack of design machining on the plenum cover plate. It wasn't bad looking like that, and perhaps BBK could offer the cover plate undecorated. It would be a boon to those wanting to make their own designs. A simple bolt-on installation makes swapping this plate a breeze.