I want a little more travel in the front, will cutting down the rubber stoppers help and could i remove them totally?

 

Cutting the bump stop will certainly give a tad more travel. But will also prematurely destroy your front shock.
You should consider (if it aint done) level the front end, and adding in a pair of longer shocks, The superlift 85331 kit is a good bet
http://www.summitracing.com/int/part...aised/3-000-in

 

I have a full set of doetsch tech pre-runner shocks all around

 

Well now, I reckon that whats left to do, is cut those bump stop 1 inch

 

orrrr not... doesnt matter if you have 4.0 kings. your bump stop is there to stop the shock from bottoming out and if you have factory from susp (not counting shocks) then the bump stop needs to stay where it is