why cant you put pistons in the H series?f/h/k swap FTW if your going N/A. Even though F is more turbo friendly it can take new pistons where the H cannot. It also doesn't ravage through quarts of oil like the H has been known to do after some miles. AND to beat all the heads on an F motor can come extremely close to the vtec heads on the H series even though they are single cam. Why do you think bisi uses them?
Turbo you can use just about any engine. Its so cool it can make even a torquelss D series have life to it.
the d15 are single cam 1.5. the d16 came in 1.6 and i that was what was in the old integras. he gave you good advice about just turbo it if that motor is your only other alternative...I believe its the 92-93 h series that have a closed deck. it would be the one you want if you go h series.
in the older hondas they had a dohc d series like in the integra I believe they came in 1.5 and 1.6 flavors
if you have the si engine don't swap it for some crappy 1.5 engine. the engine you have is fine turbo it
i know the d16a was dohc in the old integra I was about to pick one up I thought was a bthe d15 are single cam 1.5. the d16 came in 1.6 and i that was what was in the old integras. he gave you good advice about just turbo it if that motor is your only other alternative...
head lift FTMFLjust remember to replace head studs and head gasket if you do a turbo upgrade for it. Lots of people skimp on it and end up lifting the head up from weak stock headbolts.