you have mad torque so dont worry about that, it is the top end speed you have to worry about, unless you regear your top end will be around 60, but thats shifting up and down depending on the wind and the slope
I've ran 70 and even 80 on the freeway (until the wind blew from the front). 2.5l, 33's, 4.10's. Hopefully this time I will be able to get rid of the 4.10's and swap in 4.56's. Anyway, once you get used to it you don't really notice it.