vh commodore struts basically bolt straight in to the rolla, the bolt pattern on the tops fit the original holes, the struts are the same length the springs are the same diameter.
I put kingswood discs on because the commodore discs sat my wheels about half an inch outside the gaurds and the kingswood 1's fitted straight on and brought my wheels back in.
The brake lines of the commodore calipers bolted straight up to the factory metal lines in the rolla.
The only modification i had to do was the bottom commodore control arm had to be shortened to the same length of a rolla 1 because the ball joints are different lengths, the rolla ball joint isnt long enough to go through the bottom of the strut.
The steering bolts straight up in the same place aswell.