generally, the original injection manifold is used by the purists who want OEM stuff.
From a performance perspective, its pretty average - it works in its designed space, but thats it.

Manufacture of a basic log style manifold will outperform the standard manifold, even with little to no thought to dimensions of said log manifold, and then availability of parts becomes simple. Throttle bodies, injector bosses, injectors, fuel rails are then off the shelf items.

Recasting the original would be great from a historical point, but i'm not sure anyone would use it over a log manifold unless they are puritan.