All 14" Challenger "rallye wheels" will be 14x5-1/2".

The 14x6" "rallye wheel" was introduced in '73 for b-bodies with G70-14 tires.

There are 2 different big-bolt-pattern 14x5-1/2" "rallye wheels" #2944 252 ('70-'71) & #3580 058 ('72-'74)

FYI - The 14x6" "road wheel" was introduced in '71 for b-bodies with G70-14 tires.