Steven Willis is correct about the weinmann calipers and levers needed for a 1974 raleigh international - plastic bushings, bolts through the back of the caliper - weinmann big-drillium levers - carlton hoods. However, there are subtle variations between the late 1960's calipers and levers and carriers, and the mid-1970's calipers and levers and carriers. Here is a web page that summarizes some of the differences.
http://www.ece.ubc.ca/
I ran into trouble when i bought a mid-late 1960's brakeset that looked EXACTLY like the right one (in a blurry ebay picture), and not a single part of that brakeset would have interchanged with my 1974 bicycle. Gosh!
- Don Gillies
San Diego, CA