those should work. although i dont know how well with an original disk. you'll have to get them to see. the carriers mught need some work. go with the 750 brake. some of the later ones were dual diskers. they ahve a bigger disk, and bigger pads, so they work really nicely. you might have to drop the tubes in the trees a bit too. but they should work good. not a bad price where it sits now either.
jc
jc