I have sourced the GTR-33 half-cut is around 20k, so I guess the 34 and 32 is plus 10k and minus 10k ... The again, the prices varies depending on market and auction (US and AU are stirring up the prices real badly - bastards). Finding one would be a real biatch to start with ...
Software is as cardinal as hardware in squeezing out power from a modern engine these days. Just plug in a laptop, reflash the ECU with a new ignition and fueling...