I've never had an FE, but don't know why it would be any different than a small block when it comes to breaking it in. I run the cam in by running the engine at about 2500 RPMs for about 1/2 hour. After that, I dial the engine in, and then drive it like I stole it. The only real thing to watch for in breaking in a new engine is not staying at any constant speed for long periods of time. Vary the engine speeds a lot during the first 2000 miles to seat the rings.
Oh, and change the oil after the first 1000 miles to get all the engine assembly lube out of it.
Oh, and change the oil after the first 1000 miles to get all the engine assembly lube out of it.
