i realy would not bother.. powerful motor..but a heavy motor...alot of work to put in a integra.... your beter off building up a engine....where you can put any b series motor in your car you have lot ...
put a gsr motor in it or b16 would be cheaper...make sure u get a b16 tranni or gsr tranni though ...if you use the ls tranni it will be slow...too long of gears and b16 has no tourque to pull it thro ...