Chevelle updates

[RPOLS3]

So............I had some time to mess with this today and ended up taking the valve off again this afternoon (took another brake fluid shower) because I could not remove the pressure switch while mounted in the car, regular socket was too short - pressure switch terminal poked out the top and deep socket was too long to get ratchet to work as brake lines interfered and zero room to swing a wrench of any length. Once off, the pressure switch came right out - but if I am looking at the internals correctly the piston needs to move in the bore to get the port to a spot where the centering tool will work? Does not appear to be enough room to use a pick to move it either.........what am I seeing here? Do I need to remove the nut on rear line port to push the piston to center? Somewhat hesitant to start taking things apart on a freshly rebuilt valve and create other problems.

Time to turn on the Illinois game to see if they can beat Iowa to be Co-BIG10 champs......

Thanks