you can get away with using your old axles, but its anyones guess how long they will last with the h22a setup...depends how u drive it, same deal with the tranny.

u will need:
the h22a engine (longblock if u prefer)
the p13 ecu

u can mate the f22 tranny directly to the h22a, however i would have to recommend going with at least the h23a1 tranny if possible.

the f22 tranny will prob break eventually from the extra 70 or so HP
same with the f22 clutch it wont last, although a h22a clutch will fit the f22 tranny spline

i did it with just the engine and ecu, im not sure what u will need to mod on the f22 harness, the h23a1 is straight thru, except adding 2 wires for the VTEC solenoid <-> ECU

~boomer