I always liked that old long body 4 barrel carb...things to do... check out the casting lines inside the bores ...usually they have sharp ridges where the mold didn't line up . sand paper and a stick and polish the air flow thru the carb. then a new rebuild kit and check that every thing works choke operation, choke unloader you can adjust ignitiin timing and accelerator pump to work together off the line. and I used to bend a 16 penny nail and weld it to the primary linkage so at full throttle it would kick in the secondaries with out the vacuum pull... Retired Ford engineer.