This thing is still fresh in my mind. I am trying to envision how cutting the spacer in half would make the task easier. I had to modify the metal of Kirk's spacer in a couple of areas to get it to go into place. I also had to modify the car's sheetmetal to accept the new position of things. The gas pedal linkage to the throttle cable needed lengthening and fine tuning because the gas pedal is now 2" forward. The vacuum line for the brake booster needed a new hole drilled into the front truck sheetmetal because the booster is now 2" forward. The clutch fluid hard line needed a new hole because the clutch master was now 2" forward. Then the clutch fluid hard line was a little bit shorter due to changes in its geometry and resisted screwing back into the clutch master. I had to bleed the clutch fluid. And there was more. And I was working on a nearly perfect Pantera and scratching it up was not an option.
But yes, cutting the spacer in half will not affect its structural integrity.