i've decided to put a b18a1 into my 90 civic dx hb. what exactly do i need? what problems am i going to find? what the best place to get instructions on doing this swap? i just need any and all information i can find on this.

 

Try these:

http://www.hasport.com/88-91_B-series_Swap_Tech.htm

http://www.hasport.com/88-91dx_sir.htm

http://www.hasport.com/M88_B16_partslist.htm

http://hybrid.honda-perf.org/tech/4gtech.html