Vintage alleycat ideas, please

I'm turning over the idea of organising a vintage-only alleycat race for the springtime, here in Minneapolis. Thus far, this is what I've come up with:

• 1977 cut-off date. Nothing made after that.
  
• All frames must be steel (Easily checked with a magnet)
  
• Geared bicyles welcome, but limited to internally geared hubs, or derailleurs and 10 speeds. Not 12, not 14. 10 speeds.
  
• No index shifting, friction only.
  
• SS/fixed bikes must have cottered or one-piece cranks.
  
• Points awarded/time slashed for mechanical oddities. Anyone with a Positron derailleur gets a minute off their overall time, anyone using the Integer freewheeling crankset gets a minute off. Like that.
  
• No dual-pivot sidepull brakes. They bug me.
  
  
  

I'm having trouble coming up with ideas for checkpoint tasks. I don't want to make them annoying, but they should be challenging. Any and all ideas welcomed, though if it's fookin stoopid, it will of course be mocked.

Thanks,
Blight

Jules Verne's - Around the World in 80 days.

sure 12 speed was available before 1977

As were cotterless cranks.

Yes, but not common. Look, I'm not saying it has to make perfect sense. I'm just trying to get a certain "feel" going here. I may relent and accede to 12 speeds, if the rest of the bike is in good form. I'm just trying to not have people show up on a 5-year-old Surly LHT and call it "vintage."

OOooh, inch-sized tires only! No 700C allowed!

C'mon, c'mon, make with the jibber-jabber for checkpoint tasks! Do all my hard work for me!

i dont think you'll have that many entrants so no need to wory about checkpoints..

Especially if you're having to ask a bunch of retards in London for advice...

Especially if you're having to ask a bunch of retards in London for advice...

He probably knows that some of them are vintage. ;P

Especially if you're having to ask a bunch of retards in London for advice...
You lot of windowlickers are different to my lot of windowlickers. Just as retarded, but the spelling's different.