Honestly if you are planning any power adder or the converter I'd keep your stock gears for now and think about suspension or tires as 3.15 gears are close enough to what you'll need with NOS and not too far from 3.31s if you stay NA with a converter

I've got a 2013 running 11.50 with exactly that on that shitty San Antonio track. Only other things are a 3C converter, off road pipe, driveshaft, roush upper control arm, swaybar delete. If he gets his foot healed up where he can drive again we'll take it to Little River and I expect it to run 11.40s no problem.

Yes. Here is the car kdanner mentioned:

Thanks guys Ill probably see you at Little River its the closest track to me. Im going to get some times with the suspension and lighter drag wheels before I put the power mods on .

Sounds good. Look forward to seeing you out. :)