The clip, 372223-S2/7, for transmission cooling lines is designed for two 5/16 inch dia tubes, the clip, 357655-S, for use on the I-6 (both 170 and 200CID engines thru 67 - no 68 eng documentation from Osborn) vacuum and fuel lines is shown for two 1/4 inch tubes so a pair of pliers would "shrink" it to fit. I think the fuel line may be 5/16 in dia, still within the range of the pliers treatment. There still remains the question of width however. The transmission cooler line clip is 1/4 inch wide.
Jim