Re: New guy...acquired a bike that is screaming for a motor
Hi Jim, welcome to motorbicycling!
You could add a frame member that goes up from the lower section of the frame to that lower top horisontal bar and have the fit you need for a HT engine. BUT you will need decent brakes and I don't see any there, nor provision for them.
Maybe stash that bike away until later and get something easier to do.