[dcb]

well, I'm thinking ust for simplicities sake, drop the pan and cut the crank with a cutoff wheel just outside the middle bearing so you have three bearings for the two cylinders near the flywheel.

Then pull the rockers on the disconnected cylinders
hook the alternator up to a wheel/inboard axle shaft via belt/something
put an electric motor on the water pump
aeromod the heck out of it
figure out a lockup switch if appropriate
and see if you can't make something that can cruise at hiway speed at a real decent mpg.

replace alternator with altermotor and install a trolling battery to help a tiny bit with getting up to speed, after initial hiway tests.