Here is the engine assembly room where the magic happens and the Tomei Genisis engines are put together. It is tiny and crowded but neat clean and well organized. The room is also temperature controlled for more accurate measurements.
The engine assembly room is smaller than a two-car garage and a lot goes on in here.
Here a 4G63 stroker kit is laid out and readied for assembly.
Here are the build sheets for the engine with its as measured dimensions. clearances and weights.
Here is a vintage Tomei Datsun A-Series enigne.