Ideally, you want the spring inline with the applied force. Typical road race setup has 5-10* but most often packaging can dictate positions.
Body roll makes a difference on what is actually inline with the applied force. You also want the lower mount pointing at the center of tire contact patch to keep leverage effects at a minimum. 5 degrees or so would be about right.
yeesh! someone has their smarty pants on
__________________
Rod Prouty
My websiteAuto-cross 101
I'm not a Real Racer but I did spend a night in the Pozzi's motor-home Bangshift Stories
I’m not the smartest guy at the track … but when he goes home … I’m still there testing, tuning, learning & getting faster.