I'll follow this for motivation and pitch in where I can, but a century a month won't be possible for me, simply because the only vintage bike I own is my Sunday-best, and it only comes out when the sun's out and the roads are dry. And I live in England, so I don't expect that to be till about late March!
I haven't done over 100 miles in a day for absolutely years. My out-and-back training rides tend to be in the 45 - 70 miles range, although I did manage 84 miles on the Saturday after Christmas (on the other bike), stopping off at my bro's 55 miles in for some refuelling carrot cake and tea. It made me think that I'd like to get the Ron Cooper out for some longer days this Spring/Summer, and rather than just stuffing a few bits of food in the back pockets I'll plot a route and make sure to stop via a country pub or two for sustenance. Expect some photos of rolling Kent countryside, horses, cows, oast houses, pints of ale, and of course the Ron.