Just took the front 26x2.0 wheel and tire from my DF mountain bike to see how it would the Schwinn fork. Not bad but the fat tire was rubbing at the top. I'll have to look for a cheap 26x1.5 tire to see if it clears better.

I have a dynamo hub with drum brake, so reach won't be an issue. Now if the skinnier tire fits, I should be able to get another donor bike for the back and hopefully with all the bits and pieces I need to finish it off.