[Karl Bebout]

I'm sure either size would do fine on the twisting. The longer one will give you more leverage to cut, but I carry a pair of DIKES since their pointed nose gets in tighter places. BTW, I got my pliers at good old Harbor Freight and they work just fine and didn't cost me $50.
If you are needing a lead mallet, get at least a 6#er. There are good instruction videos on both using safety wire pliers and installing knock off wheels that are worth seeing. Search CC and they'll come up.
The easiest way I remember which way tightens the spinners is the rotation is towards the back of the car, regardless of which side you're working on.
See you Saturday morning, if you manage to haul yer butt outta da bed.