Measuring acoustic phase difference between two receivers
Keep in mind the following calculation:

$$ \frac{1130~\text{feet}/\text{s}}{1700~\text{cycle}/\text{s}} \approx 0.66~\text{feet/cycle} \approx 20.26~\text{cm}/\text{cycle} $$

Your delay distance is longer than your wavelength.  With an FFT approach, you will only get the delay as a fraction of a cycle, so you'll have to account for that.  If you can't frame your FFT on a whole number of cycles, you will need to estimate the frequency and calculate the phase shift from there.  Then, using your frequency you will need to calculate the actual delay distance.

Generally, if it is the same signal, you will get much better results using autocorrelation in the time domain.  Your next best bet is to make sure your FFT is aligned on a whole number of cycles, then you only need to calculate one bin.  If you can't do that, in my blog articles, I have frequency formulas from two or three bins and an method for determining the phase very accurately using the nearest three bins.  (See my profile page for a link to my blog).