I put on some clipless pedals. Old Ritchey single sided SPD, 205 g the pair.
Oh, the bike shop let me root through their boxes of old freewheels and sold me these for $5.
The left one is a Suntour Winner, standard steel six speed 13-19, 304 g. The right one is a Suntour Micro, all aluminum, 13-19, 162 g. I haven't decided if I'll use either - was really looking for a 13-23 aluminum freewheel like a Zeus 2000. The Micro will give me a low of 42/19, not as low as on my other fun ride bike which is 39/21. I can climb most local routes with 42/19 but there will be more suffering involved. Still, the price can't be beat . . .