If you're on a budget and have shops with good used parts selections you can probably get a decent one-piece BMX crank to put on there for $5-10. If you got the dough get the adapter above. You'll have to pop out the Ashtabula cups that are still in your frame. Hammer + screw driver is what I use.

Hope you get it on the road soon. The other day we had two Free Spirits on the same page over in SSFG!

ThimbleSmash's



And mine:


Free Spirit Sunbird by Lester.L., on Flickr