1978 parts compatibility

Hey there... just looking at getting my first bike, something I can tinker with come winter, not too pricey, and been eyeing up a '78 CX500. Seen a lot of really nicely done ones online, and Cafe Racer ones as well. The (rather stupid) question I have is about the brakes. I've done all my own...

After restoring many early 1970's CBs I just finished a '79 CX500D for my son. I really loved working on and riding the bike and found a 1980 with 1,100 original miles for myself. I love the look of the 1978 and am wondering if anyone has used the plastic maggot on a later year. It looks like it...