64 fairlane carb upgarde

[CORY 64 FAIRLANE]

question i have what Adapter 1 BBL to 2 BBL do i go with because i'am pertty sure that my under the hood space is close to falcon or mustang (same body just difffrent skin right ) i know of two adapter on the market langdon's, clifford . and i want go with the holley 5200 carb because i have used them on my 2300 four banger in my danger ranger . and there cheap . thank's for any help you thow my way .