And a N6.0NA Bowfoil is 70" long also.
I installed one on my P19 when I went to the MX sailplan. And the biggest improvement has been in upwind performance. I can sheet the main tight enough to "stand the leach" up and control the squaretop mainsail. She drives straight through waves and does not "paddlefoot" over the waves.
Now I have done something I haven't seen anyone else do ... using 1/8" spectra I have tied cross bracing from the bridle tangs over to the bowfoil on the opposite side, this is so the foil is "locked" in place on the centerline of the boat
Harry