The tide has been turning on a gas pumps inner workings for awhile now,and many who removed a pumps guts decades ago and threw them away,don't want to admit their error now.
Too many of these have been harvested out due to owners short sightedness,or an excuse of a sore back,and it's really a shame.
I sure wouldn't limit gut removal to a super rare pump vs.a more common pump,as who's to say what's super rare & what isn't,as what's common today,will surely grow more rare over time.
Once they're gone,they're gone and they can never be found again for this very reason.If you don't want em in the pump itself,at least remove em & keep them near the pump for the next owner who will most likely want them,but in all honesty,they're more attractive if left in,than lying in a box somewhere.
And why not just use your pump to store them in,then in a box?
Very rarely is their a considerable amount of gasoline left in there,but if there is,just open the intake and drain off the residual,then button it all up.
You can use oven cleaner or the like to easily remove any varnish buildup on the piping inside,motor,etc.
As well as this attention to detail with leaving a pumps guts in,makes em more attractive & stand out from the gutless others.
Plus,if you're keeping it outside year round,it's a great deterrent against thieves to walk off with.
Don't make future generations have to guess about what a gas pump once looked like with all of its parts intact.