Ditto on what Dave said... Especially two "double pumpers"... You need to find out the specs for the rest of the engine. Stock? Rebuilt? Compression? Cam specs, etc., etc.
Just something for you to think about... The factory used two four barrels or three two barrels to increase performance on the "high performance" vesions of their cars... Multiple carbs went away in the late 60's because the simpler, less costly 4bbl carbs worked better, were easier to tune and out-performed the multiple carb set-ups...
I know you are excited about your "new" car but use some restraint and continue to ask questions here. We will not mislead you...
Mark