Im wondering if the rear brake line on the 600 is the same as the 750. I just bought galfer lines, but now i want to install a 750 swingarm and want to know if my rear brake like will work.

it will work fine. the line will snake between the bracing on the 750 swinger.

The brake lines will work ok, but the different is the brake line secure bracket. On the 600 are screw in, on 750 are permanently weld. If you are using a new it does not mattet at all. The original line have rubber mont at different location.