Lots of people go to the 96mm bore to give them a little more displacement and power. SO, what is needed;
1. Obviously the correctly done installation of pistons and cylinder, with a little of "fix it while you are in there" may lead to having the heads rebuilt or other. Take the time to do it right otherwise you may chase your tail as to the cause of any problems you may have.
2. Compression ratio - You'll need to properly measure your combustion chamber size, in order to get the right compression ratio. Some say that about 8.5 to 1 is all you should ever hope for (or lower) without other work.
3. Induction, although it is only about a 5% increase in displacement, you should plan to verify your air fuel ratio and take whatever steps are needed to bring it back to stock. As I believe you have stock D-Jet (for a 2.0l) you will have to figure out how you want to do that. SOme of the D-Jets had a "mixture" knob on the controller, but I think that was no longer provided on the 74 2.0.
People have quoted an honest 115hp (with D-Jet) from a 2056cc that was built properly, so that should be a fun little powerplant.