R&R a Foxbody engine in 4 hours? That's booking! He obviously knows what he's doing!
I took a LOT longer when I converted my old '91 4-cylinder, auto to a 5.0, 5-speed.
Now a GC Impreza? That's cake. I can have a 1.8,2.2 or 2.5 out in an hour or so.
Are you going to run the electric motor through the Ranger's o.e. transmission?