I had one for decades under my stock R/T hood But 2 things here I had a stock intake & yes there are different heights of the neck where it sits on the carb , the 383 are much taller as the intake sits approx 1" lower , the 440 ones are more rare & have a shorter neck . Will a 440 one fit , most likely it will but it will depend on the intake height as well as the engine , all carbs are the same height at least