The one in the bottom center looks like the one I received from
McMaster-Car but without the pressure gage.
Incidentally, those 6 and 8 PSI Carter vane pumps have a decal on them
stating not for aircraft use. Is that CYA??
They are $5.00 cheaper from Summit Racing than the ones I bought
from Car Shop.
You might want to send for a catalog from this surplus center: "
www.surpluscenter.com <http://www.surpluscenter.com>"  Karibian

Choose the one that is 0-30 psi so the injector holes can be of reasonable
size. Bottom center is now right center as I rotated the jpg.