Matt I think thats possible like some electric trains have?
The guy said it had regen, I figured it was from engine breaking only
I dont see complicated brakes like a prius in their simple setup.
I still have doubts on the crank snout of an A series to support
the torque even a small 50kw electric motor which depending on
battery could make 250+ lbs of torque from idle.

I like the commercial one by a famous dc and ac motor supplier which
I cant find the link to atm but this will do its the same principle
http://300mpg.org/2012/08/13/diy-hybrid-pickup-truck/