I just picked up a 90 civic ex sedan with a blown engine for 500 and now looking for a swap. I can get a h22 swap for a good price. How difficult would this conversion be? Or would i be better off with a simple b18c
B is easier- if you want to put in an H, prepare to do some major "massaging" of the engine bay. Look to Bisimoto's D to H adapter- it's the way to go if you really want to put an H into your 4th gen Civic.