You know, James (kidglok), I thought about your question more, and actually there was some science behind how I decided to route the exhaust system. More of consideration than science. I suppose you could call it the science of space management.
The science part of the exhaust system is the tuning part of the system. Primary and collector pipe diameters, primary and collector lengths. The consideration part of it was, how to package that tuned system around the engine and in the engine bay.
The exhaust system is an equal length, tuned system. That means the primaries and the collectors are very close to equal length, including from side to side (bank to bank).
What my style of exhaust routing does is allow for the collectors to maintain tuned and equal lengths. That was the first and foremost consideration for the routing.
What the routing also does is allow for easy access to the spark plugs and to the front mounted accessories, wiring and plumbing, while still allowing for removal of the valve covers for valve adjustments.
This is how I look at it. When you open the hood on one of these cars, what is the first thing you see,... or don't see? It's space. A lot of empty space. If one could look under the hood with the hood still in place, you could see that there is a lot of open space between the hood and the engine. I chose to use that open space and not pack the exhaust tightly like some other exhaust systems, that make getting around the exhaust system for other mechanical jobs a royal pain.
