Starting line ratios

Whats a workable starting line ratio for a blown chevy fast bracket car, currently has a 3.89 rear with a rossler 210, and 34.5 tire, is this at least a good enough starting point? What sporox 4 link settings? Was a turbo combo previous to me buying it! Any thoughts aporeciated

 

I can't think of a blown application that wants a 210 low gear. The good chance converters seem to pull tall ratios and act really loose but still lockup good down track.
If I was shaking down an unknown combo I would err to the side of a numerically low first gear and a loose stator.if the car is soft with little timing dumped at launch that tells you to get more aggressive.
Can you launch the rossler in second?

 

my Rossler is not the type that is able to launch in 2nd gear,but yes I do know that is a avail option down the road,also the rear tire is something I can change because it needs new ones before I go out so I could go to a shorter tire or stay with the 34.5