3.23 vs. 3.55

Happy Saturday to you all! :)

My 69 Cuda restoration saga continues and I wanted to get some advice on rearends. I have two 8 3/4 rearends available to me of equal quality. One with a 3.23 ratio and one with a 3.55. The car will have a 4 Speed with a 408 motor giving about 380HP and 455ft/lb torque. It will be mainly a cruising car, with some highway driving. What rearend gear do you recommend?

Thanks for your help as always.