Installing the loose one will be the easiest or quicker I guess as none of them are really hard just was a bit time consuming to get the Lotek one installed and look ok. I used to have the 1 gauge Autometer pod on there before I installed the Lotek one and only thing was I did that one quicker (installing it ontop of the OEM piller) as I have not issues with the look and fit otherwise running the vacuum tube, wire it all up etc is all the same effort whatever route you decide to take.