I would think so, yes. But, I think you need to find a place for it after you make the step from -10 to -6. It's a little easier in this case since the 1407 is a single-feed. There are fittings available with a gauge port, just a matter of finding one that fits.
Not sure if in fact there are any fittings that will go from a -10 to -6. though, never seen one or had any reason to look for one since normally you don't step two sizes down. You will probably have to go from a -10 to 3/8 NPT or some such thing.
So your carb inlet line would probably go; regulator outlet > male -10 to -6 (however that is accomplished) > small length of -6 (or 3/8 line) > gauge fitting > bowl. Make sense?
I might be making a bigger deal than necessary about the pressure change but if it were me, I would want to ensure the bowl was in fact getting the pressure it was supposed to coming off the regulator.
