Are you asking about the connecting rod? If so, it would be much better to leave the cylinder height alone and install a "longer" rod. We already have a negative deck height (-.162"). That's about 4mm. So a connecting rod that is 3.5mm longer than stock would reduce the negative deck to about .02" (about 0.5mm). That would increase compression and also provide about .04" quench. Both good things.
The downside is that you would have to find a suitable connecting rod, and then install it. I bet it would be very hard. It requires disassembling the three-piece crank assembly and then reassembling and truing. Very exacting work. The assembly is pressed together, and the right & left wheels are different diameter and also not full-circle. That makes truing even harder. The assembly would also have to be rebalanced. What a project.
But hey, I have thought long and hard about trying it. The longer rod would improve the rod vs stroke ratio. Longer rod engines make better torque and horsepower. The longer rod increases the piston dwell at TDC, which results in more time for pressure to build and improved mechanical advantage during the power stroke.
I looked at the DR rod bearing to see if it was the same as the LS. It's not. So even if the DR rod is longer (I have no idea if it is or isn't), it probably won't fit in the LS wheels. Hope rings eternal. A long-rod crank assembly would be sweeeeeet. It would increase compression, create proper quench, increase piston dwell, improve mechanical advantage, and allow use of the standard cam chain and tensioner assembly. It would be a real nice modification.