20” fan/shroud on a 70’ b-body?

Any reason I can’t use it? I only have a 22” rad cradle so would like to take advantage of a little more cooling coverage, I think stock for 70’ is an 18” set up, 74’ and later used 20” on b-body’s.

Any thoughts?

Not aware of a 20" fan shroud on a 70 b body. There were 22" & 26" on 8 cylinder models. I think there may have been a 19" on the 6 cylinder. Not sure on that though.

Sorry, I wasn’t too clear with my question, shroud is for a 22” rad, correct fan is about 18”. I thought later (74/75) b-body’s used a 20” diameter fan with a 22” rad, just wondered if I could use that setup on my 70’ b-body.