Notched passenger side fenders?

Rat Patrol said
I'm a little stunned by the lack of clearance.......

I was under the impression that the 6.1s dropped straight in with some frame rail work for the alternator...like the pic below.........

You can see where I notched for my alternator in a couple pics. Didn't need much at all. Funny how that was less than some who do the swap, but my valve cover hit...