if i bought a replacement engine, just like stock, in my case a d16z6 1.6L how difficult would it be to swap the two and what special tools would i need to do it? do u recommend letting sombody do it for me. theoretically(spelling?) if i got the exact same engine, couldn't i just take everything off the old engine, take it out ,put the new one in and put everything back and hook everything back up? if anyone has any expierience with this kind of thing please help.