i just bought an integra rs…i blew a head gasget…i was going to replace it but befor i do i was wondering if the rs comes stock with a b16 or a b18…if a b16 i was ganna go ahead and replace it with a b18 but if it already has a b18 i was going to replace it with a b18b vtech
also are the wirings to hard to put on for vtech if not what do i do