[MKS427]

Ed has many great points.
However, it is important to cover the apples to oranges here. The Coyote is a 4 valve variable timing engine that naturally has weak low end torque and big high end horsepower. With a supercharger 690 hp can be SAFELY achieved with pump gas. That said, your personal concern with the Coyote is physical size. The foot boxes in you FFR most likely will need to be modified to accommodate the Coyote.
I personally chose a Craft 427 w/Dart block over the Coyote. RPM Air Gap instead of the Victor jr. 582/572 on their dyno, but the pull started after peak torque. This block can be taken to 465"/468" (465" leaves you 1 refresh on the block). I personally like the big low end grunt. Important note, the cam required has bad low end vacuum, where a carb just doesn't work well below 1800 rpm. I ended up changing to an EFI to work around this.
If I were considering racing, I would consider a Coyote with a dry sump.