Yeah but
Somehow, someway, you should get a pin to pin luff measurement from YOUR boat. They are all a little different, and while the published lengths should be close, and the deduct for the Harken furler is pretty standard, you could end up with a sail slightly long, or if you are looking for a heavy weather sail as it seems, it is more critical-if you buy a sail with short luff, and it is more than about a foot shorter than the available length, you should have a wire pennant attached to the sail so the top drum can be close to full hoist even with the short luff sail. The reason is that without the pennant, the top drum could be 2-4' (or??) below the halyard sheave, which could allow the halyard to wrap around the headstay when you try and furl the headsail.........which is a long way of saying you are taking a risk trying to get a furling sail to fit without having a real pin to pin length from the actual boat..
Good luck!