Drilling, sawing, filing, sanding, &c.
See, the problem is that the post war Raleigh Record Ace came with a lot of parts made specifically for that model, as you can see from this old catalog page:
The stem was hand brazed from 531 using 'lugs' that resembled the lugs on the frame; very snazzy, and very hard to find now.
The pedals, and the crank, are even harder to find. And without the right chain ring, the bike just won't look right.
I did, however, get one of these on ebay. Which is where the drilling, sawing, filing, sanding, &c. comes in.
I'm not done yet, but it now looks like this: