[fredmeister]

The rake is only for aerodynamic effects at high speeds. You don't want the front end raked higher than the rear or air catches underneath the front of the car at high speeds, creating lift. It has minor effects on suspension geometry.
Setting the ride heights to recommended fender heights is an approximate guide to make it easy to measure and still get the angles of the suspension arms in the right spots for best geometry. It is better to measure to pivot axis/torsion bar centerlines, but this is harder to do.
Basically you would like to see the front lower A-arm to be parallel with the ground for best handling since any motion of the suspension up or down from this point has least effect on static camber settings. It also has least effect on bump steer provided you account for this by spacing the steering rack (up) to get the steering tie rod parallel as well.
Once all this is done you need to fine tune height again during the corner balance routine.
Hope I helped you.