Looking for some Differential advice

So, if I’m reading this right, you guys all agree the /6 would do better with the 8 3/4 rear end, but 3:73 gears are going to be a ***** with either the /6 Or the 408? I have 2 new sets of 3:73 gears. What would the BEST gear be? 3:23 or 3:55? I’m not racing it, but I want it to scare a few Challengers!