Never been on a dyno. Best ever 9.00@150@3340lbs.572, guessing 900+, 727, 6100 flash. A 200 lb in my opinion is way to stiff. Rear will have very little help with rear seperation as the springs are barely compressed at ride height. Be aware power affects 60 ft. My bet is your combo has at least .05-.10 left in 60ft. Once the rear is scienced out chances are the 90/10 will be too loose. Just had my front Afco doubles tightened about 50%
Doug