if you lay it on a flat surface and the round part that sits on the carb is original and uncut

383, the whole unit will sit slightly off the flat surface

440, the unit will touch the flat surface

the 440 unoit is lower due to the 440 being slightly taller than a 383


69.5 A12 Bee, first purchased in 1976, car 169 on registry 69 Coronet R/T 440/4 spd 69 Coronet 500 Conv H code 383 4bbl/auto 37 Plymouth PU Find your spot on earth and ride it.