Power steering is good! I have the long arms on still and yes its increased the turning circle. However, if you really want to up the arm muscles I would suggest that an XD ute without power steering was worse than a holden and worse than both of them is a 4WD 89 model hilux without power steering. It was a tough one in the car park.
There is no way of knowing if your ute/van ever had power steering factory fitted anyway, other than next to none of them would have as men were men in the 70's and they wouldnt have been caught dead taking that wimpy option! They also all were rather proud of their sunburnt right arm because only a wimp had AC! They were the days. Going to Dubbo with Mum and Dad in the HJ wagon stck to the vinyl seats. But the best bit was getting back into the bloody thing in the middle of summer after it was locked up in the car park for a couple of hours! I dont reckon my kids would handle it too well if we went back to a HJ wagon lol.