Cart before the horse here but the pump is here so I thought if mock it up. Just a temp plastic coupler. It’ll be 5 1/4” proud of the front. Ill be adding a shield over it. It’s bigger than the older Cessna pumps but it’s what I have. (It’s not tight here so it’s hanging a bit.) I have a piece of 3/16” plate that’s almost the perfect size. It’ll bolt to the two factory holes in the front and the pump will be able to move if it needs to l.