if you go the "center section swap" route and use your holley plates and bowls..
make sure there is no interference with the base of the center section and the base plate..
some situations require you to file and or clearence the boss at the vacume port or other areas...to get the plate to set flat on the center section with out a vacumme leak..
the topic was just carb for carb swap....
but i thought id mention this based on experience.
cheapst