I recently found out that I don't have to replace the calipers because the 92 integra ls calipers are in the same position as the 91 civic dx.
Thanks for your insite but I'm still not sure whether I should buy the knuckles to fit the axles. What do you think? Also, I figured that since the the B16a is heavier than the d15, I bought a Skunk2 coilover kit and traction bar. Hopefully this will accomodate more room in the engine bay as well as provide adequate suspension for the new engine.