As you may know im putting in a DOHC ZC in my civic. they told me I would have to wire in a crank sensor and I have no clue what to do so please if you have any help full information please let me know. thanks Tom and I belive my car is OBD-0

 

is your car a HF, SI, STD or DX.
Thats the main point to start with
If SI or HF take the 2 blue wires that are in the original distributor plug which will be round and have 7 wires and extend them to the crank position sensor on the exhaust cam. ZC use an external crank position sensor.
If its a STD or DX you will need to run the wires straight from you ECU pins C1 and C2 because the ZC distributor uses the square 5 pin plug

http://hybrid2.honda-perf.org/tech/mattdx2zc.html

 

Its an Si and where are they located and how many are there?

 

There are 2 blue wires. One is blue/yellow other is blue/green. There both in the distributor round plug. Just cut those 2 wires and extend to the crank position sensor on the cam match them color for color.

 

And thats it nothing else?

 

yup thats the only wiring difference seeing your already SI.