Speaking from experience at least a 850 carb,and please get rid of that glass fuel filter you don't want to see what happens if it evers cracks,lastly you need to feed that motor go with a electric fuel pump...
I do have a holley red pump, and with solid motor mounts probably won't hear it, so I'm thinking about it but mainly cause my rad hose touches the fuel pump a lil=[bmw radiator from late 90's 7 series, if you get one from a 3 series it drops into early a-body core support w/tabs welded from frame horns with holes drilled for the pegs to locate.]
Yes, I need a aluminum re usable
they checked the filter making sure it wouldn't move/break against anything and made me wrap duct tape around it before I could race at fontana.