Bit of mis information running round it seems.
ANY rb motor that was released in a particular model of skyline is legal to be swapped in. An r32 can legally run - rb20, rb25 and rb26. As long as the complete motor, loom and ecu are used. This means all emission gear as well, and its legal. The rb30 isnt due to the ecu used.
All rb bottom ends are the same height, except the 3lt. Only it has to be lowered by re drilling the engine brackets, then it will fit in the 32 no problems or "pain in the ass".
Roy knows the 20 more than anyone, so listen to him. As far as building a 2.2 for 5.5k...its your money. I can see the point in having a fresh motor, but spending big dollars for minimal gain seems pointless.
I think the 3lt we built years ago - even then when things cost a lot more than now - cost us 5k. Its the ancillaries - rb25 gearbox, modded tail shaft, new clutch, bigger injectors, afm, ecu, turbo, then add tuning is where it adds up.
As far as your original question OP
It wont offer the torque your looking for. Its noticeable when jumping from a r32 to an r33 because you are getting 25% increase in capacity. The 2.2 is only a 10% increase.
I hate saying this, but throw enough money at something and its easy to justify, but the cash would be better spent with a fresh stock motor + turbo setup like Roy had on his 2lt, or going for the 25 / 26 route.