Hey,
When doing a motor swap there are a lot of thing you need to do if you get a used motor. Timing belt, balancer belt, oil pump, water pump, spark plugs, and wires. If you are getting a JDM one there is even more...the clutch will most definatly be bad in the JDM tranny, the distributor cap will be broken, they will send you only half the exhuast manifold, and you will have some broken sensors. Then there are other things that COULD be wrong like a bad vtec solenoid, and other little stuff. I swapped in a JDM motor this summer, I am happy, but make sure you take into account the other stuff you will have to pay for. The above stuff equals about 400 in honda parts, plus headers, and clutch, and whatever sensors are broken.
If you have any questions feel free to email me or, instant message me

Josh