need help.. ill try to explain

[jcblue]

need to know what action to take.
im working on getting my body line right and im having lots of trouble with teh drivers side... started in teh rear and lined door to cab, but the fender to door is reaaly bad off.
the bottom has a gap about an inch wide, where as teh top of the gap looks ok..
i can put a jack under teh front cab support and jack it up and make them line up, but what course of action do i need to take to keep from having to jack up the front cab support?
P.S. i put all new cab supports in and im thinking the front pillar droped down some.. Can i just cut my cab support around teh bottom, jack it up where i want it and weld teh support back?
thanks guys