280z 85 rear arms upgrade to 89 (better brakes)

[msgofast]

Does anyone have any pics of the 89 280z rear arms, I want to upgrade the rear brakes on the 85 and been told i need the 89 arms, are they the same shape and or are they lighter too, is it just the brake mounts are different or is the whole arm different.

anyone with any pics of the 89 arms would be good.

The upgrade is calipers too, the discs are going from 159 solid to 190 ventlated too.

thanks

M