Some of the key differences between the LSG423 and street engines include:
* The LSG423 has a larger displacement (423 cubic inches) than most street engines, which means that it has a higher power output and torque rating.
* The LSG423 has a different valve train design than street engines, with overhead valves actuated by pushrods instead of the more common overhead camshaft design.
* The LSG423 has a different ignition system than street engines, with a distributor and spark plugs located on the side of the engine instead of the top.
* The LSG423 has a different fuel injection system than street engines, with a mechanical injection pump instead of the more common electronic fuel injection system.
In addition to these differences, there are many other smaller details that make the LSG423 incompatible with street engines. As a result, it is not possible to use street engine parts in an LSG423 engine.