the f22 and h22 are not compatabile. sohc-dohc, plus many others...the h22/h23 are the same block, look up the part #'s. the thing is the h23 r/s ratio to start off with. there is also some things you must do to make it run right...its got the bad name from the same way the ls/vtec first did, people not doing it right and then blaming the engine for blowing up. thing is not so many people mess w/h series as to b series, so it hasnt been perfected and shared as commonly, so the rumors still fly.

for orignal questions, the h22 came w/an auto in japan in the 4th gen, so you will just need an auto ecu, and tcm...however i dont know if there is any gear ratio differences...i do have an h22 for sale though