welding at least since teh h22 is an 87mm bore and teh f22 is an 85 mm bore.
then add the fact that revving that f22 bottom end to 7500 to make the power in the h22a head is gonna kill that lower end fast.
you would do better to find a b20a out of a jdm lude since it is a lot more direct a swap, will cost less and is 160 hp stock.