[Grumpy old man]

Don't do it ! trying to cut the ends of the dash will be tough without cutting into the A pilar , Drill the spot welds it's really a lot less work than it seems and if you look there is a centering mark on the flange and dash . I had mine out in less than 30 minutes , use a 1/8" drill and center drill the spot welds and then use a spot weld cutter and you only cut thru the one thickness of metal when it's time to reweld it line up the center mark use a couple flange vise grips and loosely install the 3 bolts on each side ,start welding from the center out and clean up welds with a cut off wheel , once done working side to side and grinding smooth use short hair glass filler to smooth it all out then epoxy prime . While your at it consider welding up the windshield seams and use the same filling and finishing process .