You can mount it under the Jeep back toward the fuel tank like this
http://liberty.eurekaboy.com/kennedy.htm or you can mount it in the engine compartment like this
viewtopic.php?t=24527. Both seem to work according to forum chat but I do not know from personal experience. I do have a Facet 40109 for a future install and will likely use the engine compartment mount as the easy install and if it works there just leave it. If the Mr. Gasket is like the Facet you will need to drop by a local hardware/plumbing supply and get a couple of 3/8" barb X 3/8" MIP hose barb adapters and enough stainless steel worm clamps to attach fuel hose to the pump. I'm not too fond of using teflon tape near fuel so I'd recommend Permatex #2 form a gasket or equivalent on the threads of the hose bard adapters.
If your reference to plastic clips on the fuel lines is to the quick disconnect fittings, it is my understanding there are 1 or 2 located above the fuel tank. There may be more on the fuel line but those would be easy to spot by simply tracing the line. I'm not planning to remove mine unless I have problems but removal is a simple matter of cutting them out of the line and replacing with fuel hose and worm clamps EXCEPT that you apparently have to drop the fuel tank to get to the top fittings. That's not too hard just run most of the fuel out of the tank before attempting to drop and be careful when droping to disconnect any power lines and such that may hang up as the tank comes down. Others may have words of wisdom from experience on this topic and I suspect a floor jack with a piece of wood between it and the tank would be a big help in a controlled lowering of the tank.