[wkooiman]

I had a 428 in a 67 Mustang. It didn't leak, and it wasn't difficult to change plugs. You just have to use the proper extensions and universal joints.

It did not have thermactor, and it didn't have the shock tower reinforcements either. It was originally a 289 car.

I currently have a 428 in a Contemporary Classics Cobra. Spark plug changes are simple, but this one does leak a bit. It is an older build, completed in the early 90's. I am piecing together a 427/482. When it is finished, it will not leak.

Your kit might be harder to change plugs.

FEs cost quite a bit more, and it's harder to get parts too, but in my opinion it's worth it.

The #1 question I get with my car is, "Is it real?", followed by, "Does it have a side oiler?" When I open the hood, they go, "Wow!". You don't get that with a 351W.

Power wise, it depends on how they're built. You can built a 351W in the 427" range pretty easily, and it will make more than enough power.

But it will never look like a 427 FE with 2x4s and S&H air cleaners.