you can swap the H22 into teh hatch. you have a little room in the bay once installing it but not a huge amount at all.
the one that besides the weight of the H22 in teh HB but once installed the H22 tends to lean to teh back of the engine bay and not flat like a stock or B18 would.
I guess besides building them up it would dpend on what other plans you might have to add such s like turbo or something liek that because if that's the case the H22 would be pushing it and generate alot of hot air under that hood...
we'll I'm just rambling but I hope this might help a little..but the Hybrid forum should get you some further feedback...
