I see the spacer at bottom, maybe 1.5", just looks taller than that.
it dose appear quite a bit taller ,i noticed the base difference as we were loading the pumps ,there's another t34 display in the lot that i have not picked up yet & it has the exact same base as this one ,& stands a tad bit taller,now the reg. t34 looking at it from the underside ,it dose not have any evidence of having the "spacer piece" or anything else bolted to the bottom of pump .I'm gonna order the literature & see if there's anything on these bases mentioned in there,i have not looked at the book lately,but if i remember correctly it dose not show a base that looks like the one attached to the reg. t34 ,so it might have been just a bolt on type of spacer that is missing on the pump???