I guess I'm still confused as to what your objective here is.
All brake levers have 7/8" (22mm) bar clamps - just get the cheapest ones you can find.
You are replacing the crankset because?
I recently bought 2 brand new Shimano Alivio rear derailleurs for $15 each, so a Tourney RD for that is no bargain.
With just the parts you have mentioned (unless you're getting them for free or next to nothing) you will be close to the price of
this, which is essentially a brand new version of your Honda bike.
All I'm trying to say is, if you can scrape together the parts you need to rebuild this thing then that's great, but if it were me I wouldn't invest more than maybe $30 total (and that would be stretching it) Those kind of bikes can be had all day long on Craigslist for $35-$40.
Again, not trying to shoot down your project, I really am just trying to be helpful.