im thinking of buying some AEM cam gears for my 92 ls integra, has anyone intalled them themselves before, is it hard? is it easy to mess up while installing new ones, sorry im a new to cars and intalling parts. i think cams give you more tourque right? not sure how much. but its more than it has stock. the only thing from stopping me from buying this is i wouldn't know what near by shop to take it to. anyone know if its hard to install, or about a shop that deals with aftermarket parts?