One thing about the height that can screw up launching is if the suspension is using up it's upward travel at ride height. You want to have as much front end travel as you can and usually that means riding close to bottomed out but street driving that way isn't practical. If the front has limited travel it will be very hard to get it to hook no matter what the rear tires and suspension are doing.
Rear travel isn't as important since that can be adjusted to squat or not.
It should be adjustable for track conditions and i'd say you would have wanted to get as much rear tire hit as possible last weekend.
Drag Week is held on good tracks so getting it to hook at this 1/8th mile place should be the main priority and making sure the mirror is tight would be number two.
