Jasonh,
Yeah, that front wheel doesn't offer too much in the way of rubber contact with the road. It has a drum brake in front and coaster in the rear but if I do the motor install I'll go with side pulls in the rear. Staton mounted their engine in the rear but this trike is very tail heavy to begin with and that adds to the front wheel weight problem so I would probably put the engine between my legs mounted just ahead of the seat, low enough that I won't be burning myself on the head or getting zapped by the plug.
Now all I have to do is talk DAX (hint, hint, Duane) out of one of his old, rebuildable Titans that he has laying on the floor of his shop and I'll have my winter project.
I'll keep you posted.
Tom