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.........

is this an effect of the spool mounts? Hm, I have sandwich. But I had to cut the Schuhmacher mounts and reweld to bring the engine in an acceptabel position. Enought space now....