The only pushrod motors that are overhauled that often are straight out nhra top fuel and rail cars.

I'm going to guess that you really don't know a lot about the lsx motors by what you have been saying. If you look into any of the cars in nhra that are lsx powered run entire seasons on one build, some run even longer. I'm not saying that they have to be overhauled either (new season, new motor). Of course I'm talking about motors that make 800+ horsepower for the record.

F1 motors aren't even in the same league. They are a different style motor and are built for longevity not a pass down the strip. They have no stroke and have to rev to reach their powerband.

Last but not least....you have to be kidding if you're honestly saying that the 4.6 is a better motor than the lsx series motors. Any company could have "overbuilt" a motor from a factory. I hate how people always use this as "it's a better motor" argument. The lsx out flows, performs, and revs.