I need an air grabber air cleaner assembly for a '71 GTX 440 4bbl. What is the difference in height from the 383 base?

Easiest way to tell:
The 383 base will rest on the carb base when placed on a flat surface.
The 440 base will have the carb base not touching the flat surface the assembly is resting on.
Jim

I think the 383 base is 3/8" taller. ?

HEIGHTS FROM BOTTOM OF CARB NECK TO TOP OF CROSSBAR


1969 383 3 1/2”
1969 440 3"

1970-1972 383-400 2-1/2"
1970-1972 340-440 2"

WHEN PLACED ON A FLAT SURFACE THE 69 383 BASE WILL SIT ON THE CARB NECK

Thanks for the help guys/Tony