Here's a pic of my UltraFab 3502 tongue jack mounted on our previous KZ Spree with a 2006 Silverado ... with the head oriented in the normal forward position it just cleared the Silvy's tailgate.

I later replaced the Silvy with an Avalanche ... this is the same tongue jack with the head (with a vinyl head cover) rotated 180 degrees to the rear in order to safely clear the Av's taller tail gate.

Our current Coachmen trailer came with an LCI tongue jack with a particularly large head that won't allow my Avalanche's tailgate to lower fully ... very annoying. :M Unfortunately the design of this particular tongue jack doesn't allow for rotating the head so I am considering replacing it with another UltraFab and selling the LCI.