The initial reaction would be to stay with your training plan through to the end of the cycle if you've found it to be working for you. Which means if you're following a set Galloway plan (like those found on runDisney) to not edit the plan as a whole too much. The writer had reasons and intent behind the choices they made in designing it. Now of course, if you plan to head in a different direction or you're not specifically on a Galloway training plan, then that's a different consideration.
Galloway's plans are built almost exclusively on easy running. So dependent on which plan you're following would dictate what you would do on those two days. But my initial gut reaction is likely two very easy days of running (usually HM pace or M pace + 2 min/mile) around the oval. I'd say a 6k at 6:57 pace is something like the following fitness profile:
View attachment 403597
The difference is you're following the run/walk methodology, so the pacing scheme is a bit different. How fast is a comfortable walking pace? Not a walk with purpose, but comfortable.
Also, I'm assuming the 60 min goal is for 10k? Based on the fitness profile above, that would be about a 15% improvement. A normal improvement rate is about 2-5% every 16 weeks (unless you are super early on in run training, or you've recently increased you're training load to a much higher level that you haven't gone to prior). So there are about 2-3 cycles between now and Marathon Weekend. So a normal improvement would be 4-15%. So dropping down from 1:11 to 1:00 would not be impossible, but if the fitness profile above is correct, would take stringing together several very very good training cycles.