Rif, I think the frame was made for Western Auto by AMF (Roadmaster), as several key features are identical to my late '50s Roadmaster middleweight that I converted to a ballooner. The bent fork definitely is a result of an irresisible force meeting an immovable object.
But this is only one part of his question. Himmelberg also asked what the best way to motorize it would be, and with that, I'll say that you ask ten people and you're likely to get ten different answers.
To start, there are a number of very popular options available. The type of bicycle motor a major part of the members either use or have used is the simple 2-stroke frame mount engine colloquially known here as the "Happy Time". There are varying grades of this engine (quality-wise) as well as two primary displacements: 48cc (cometimes called 50cc) and 67cc (frequently called 70cc and even 80cc). They are relatively inexpensive, and they are also not usually the longest lasting either. There are exceptions, however...
Rack mount engine kits have become very popular as well, and Golden Eagle (GEBE) and DAX's Titan have proven to be very reliable and have a strong following. There are others out there as well, but I just mentioned the two I'm most familiar with.
Of course, there are more than the few options I just mentioned. Take some time to peruse the rack mount and frame mount forums to decide what might suit you best. Do your research, and you're bound to be happy with the outcome.