DTDK,
That's basically how I did my front end conversion. I machined, and some grinding, the lower fork clamp to fit the frame. The rest of the parts bolted on without modification. I started with a stock fatboy lower clamp. Not sure how well you can see what has been machined in this picture, but it let me put the front end on without modifications to the frame. With some work you could machine in some stops to work with the frame for stops.
What would have been nice would be a Axle/spacer kit to let me use my stock front wheel. I ended up going with a wheel with a wider hub just to simplify things.
HTH