* Engine ID format: The Volkswagen engine ID system evolved over the years. While "E58" might have been a specific code at some point, it's not a standard format that tells us the origin.
* Engine variations: Volkswagen, especially for the Beetle, produced many variations of engines. These variations included different displacements, power outputs, and even fuel types. Without more information, we can't determine if your engine was originally intended for a 1972 Beetle or another model.
* Modifications: Over time, owners might have swapped out or modified engines. Your engine could have been installed in the Beetle at some point after its initial production.
What you can do:
1. Complete Engine ID: Look for the complete engine ID, which is usually a longer code, and search online resources for Volkswagen engine IDs to find its specifications.
2. Engine Casting Numbers: Look for casting numbers on the engine block or other parts. These numbers can help you identify the specific engine type and its origin.
3. Volkswagen History Forums: There are many online forums and communities dedicated to Volkswagen history and technical information. Posting your engine ID and any additional details there could provide you with valuable insights from knowledgeable enthusiasts.
Remember: It's best to seek information from reliable sources and to be cautious about assumptions based solely on limited information.