I'm Going to assume that you currently have an F23A currently. I'm not 100% positive but I'm pretty sure you can even re-use your current tranny. As long as that's the case you shouldn't have any axel issues. Even with a new trans the current axels should be fine.
The wiring should be pretty close as well. I did 8 H22a swaps on Preludes and the only issue was adding the vtec solenoid wiring and lengthening a few wires for a few of the sensors. Well and rewiring the distributor to use the internal coil.
I think as long as you get an OBD2 Engine it should be a cake walk. You may want to double check on the motor mounts, i did read one article that with a 5th gen he needed an aftermarket rear mount but that may have been because he was originally an automatic.
Are you having issues with your current motor? I was personally thinking of giving a G23 build a shot
but that loss in compression just makes it pretty much worthless on an NA engine unless you do some heavy modification which defeats my intentions. Im just going to hold out until this engine takes a dump on me then H22a Swap. Just fyi i have a 1994.
The Swap wont turn your car into a street monster but you will definitely feel the difference on the butt dyno. I miss the way the h22a kicks when you hit vtec and trying to stay in the High Rpms so you don't drop out of vtec on the shifts. This F22a1 is...
. haha. I installed a vtec light to make sure the car was kicking into vtec and this econo vtec is sad, its basically always on when my foot is on the gas.