It seems like most of these guys are running 8 foot oars on the storm. On a 50 inch frame I have a set of 7'8" oars. One a 60" frame i have I run 8 to 9 foot oars depending on what kind of water. On 72" frame 9 to 10 foot oars. But I also have my handles farther apart than most.
I could run 7 foot oars on that 50 inch frame. I just do not own a set of 7 footers.