Per the 1970-1971 Chrysler Parts Catalog (14-29-0):
-- Retainer = base / cover = lid --
N94 – CHALLENGER - fiber glass hood - air cleaners
COVER (I ASSUME w/”rain gutter”)
***** 340 or 440 eng., w/3-2 bbl. carb. - #3577 395
***** 426 eng. chrome w/decal - #3577 396
RETAINER
***** 340 or 440 eng., w/3-2 bbl. carb. - #3577 385
***** 426 eng. w/2-4 bbl. carb. - #3577 394
BODY
***** 340 4bbl. eng. - #3577 457
***** 383 4bbl. eng. - #3577 458
Also
The last listing under air cleaner: (anybody know what these parts are?)
** COVER PLATE w/fresh air - #3577 459
** COVER PLATE ASSY w/fresh air - #3577 387