Well it is the end of the first day and while I was certain I would find problems, I forgot how fun creatively fixing them is...
Problem 1, the 3 piece crank set is too narrow by approximately .25 inches on the left side. I am researching practical ways of fixing this and it seems the most likely and ethical way of fixing it would be to buy offset pedal arms, yes?
Problem 2, the twist throttle is far too narrow to fit on these drop bars. The suggestion for converting the throttle to a lever style has fabulous timing and I greatly appreciate it. I also imagine it's a classy look.
Problem 3, my rear wheel has a sprocket already built into it on the left side and its about 20 tooth. It also has what appears to be part of a Shimano coaster brake. I'm going more research to find out what exactly it is.
Engine is mocked up and fuel tank as well. Tomorrow is another day to find more solutions.