it is not all about power.
you need torque.
torque is what will get you places,
power is what will spin the wheels and prevent you getting places.
in my case, i have a carbied 308.
it has been built to my spec's.
as the v8 has been rebuilt from scratch, it has around 190 kws of power, however, to offset the wheels spinning, it has been fitted with quite a few good bits, to increase the torque.
the torque is up around the 500 plus Nm's.
this is indeed a massive amount of torque.
other v8s have lockers etc to go places, i dont.
a good set of rubber and Torque to keep wheels turning is the go anywhere set up.
in your case, on the road it will be slow.
all you really need to do is put in a towing cam, this alone will bump the torque up.
remember this...
4x4ing although is sometimes fun to spin wheels and drive really fast (where allowed)... but you will not climb much.
torque is your best friend
cheers