If you're looking for some additional low end torque, the overbore to 128", or the appropriate cylinders/pistons, will do just that, more torque.
If you keep everything stock, your throttle response "should" be better. Couple the larger 128" with Phil's urethane Centa inserts, that should make a nice low to mid range stump puller. As been said, maybe slightly larger injectors will be necessary.
