I have an 89 Accord Lx-i (cheap family car)and i would like to do a swap so i can have more power when driving my family around? I was looking at a B21A1 to put in it but i cant find the complete motor anywhere. I also looked at the B20A5 but im not sure witch one is a better motor. If anyone can ideas let me know.  

both are good, strong engines, but they are hard to find whole. maybe you should buy bits you find along the way and then complete the engine as you go. i cant tell you much about the engines but this site can:

http://en.wikipedia.org/wiki/Honda_B20A_engine