Any clutch fan options for 73 dart, /6?

Well, I went thru My various, ahem, "parts inventory spaces" & found it. 7-blade 18" w/a non-thermo clutch, 2 7/8" from the tips of the tiny"fins" on the clutch, to the mounting
face at the pulley/pump end. The mounting flange is slotted, and I used appropriate length bolts. IIRC, there was only about 3/8" or so clutch fins to rad cores, tight to put in....
but never had a problem w/it once it was........and I revved and drove the s**t outta that thing. '73 & up discs up frt., & 10x1.75 drums in back w/ H-V rated skins, never ever
touched. Can't tell You what difference there might be from my stock /6 OE A/C swinger rad., '72-'73 may have changed, slantsixdan probably has the part#'s at his fingertips.