How hard? it should bolt in right? both B series... only thing is wiring vtec in right?

 

Yes they bolt right in, it's a very good swap. What year is your teg? If it's 92-93 your better off getting the obd1 b16, if you get the first gen b16a it's obd0 and some things will have to be changed.

 

not really he can use his ls injectors and just shave an ear off the distrib. all he will need to buy is the ECU

 

very easy 90-1, cheap and easy, just add four to five wires and be done

vtec pressure, ground, vtec selnoid, knock and second 02

92-3 integra, using second gen b16a is also the same way as above, (requires only four wires )

with right ecu program such as Mugen (90-1) can run only 1 wire connected to the vtec solenoid and run without any problems