Okay, after thinking it over, I've decided I'm going to enter my grandpa's 1962 AMF-built Western Flyer Sonic Flyer into Class 1. It's not a bike I ever planned to enter in the RRBBO, as it's just a mild "rustoration" project, but out of everything in my stable, it's the only bike that 1. I can work on by myself, 2. I already know how I want to build, 3. I have most of the parts needed to complete it, and 3. I can easily finish by the end of July. Also, this bike has been hanging from a rotisserie in the corner of my workspace for the last 3 out of 5 years I've owned it, and it's high time I get it back together. Grandpa's not getting any younger, and I'd like to show him this bike in riding condition again soon.
Here's how my Western Flyer looked when Grandpa gave it to me 5 years ago:
Here's how it looked about a year later after I did a little work to it:
And here's how it looks now. This is what I'll be starting with: