My apologies, I easily get off topic.
I ran a 13.1 in 1999, age 35-36, BW around 225, time was 1:42, plenty left in tank. Barbell and machine training 4 days a week, running the other 3. Running days would be something like 4 miles,8 miles, 15 miles. The 15 was a bit under two hours. Was training for the San Diego marathon. Started to get some hip pain, 24/7, hard to get any sleep, full personal training client schedule , I needed to be able to move around, lasted for weeks so I cut my miles way back. I believe KB and BB training are a great asset for distance runners, I just don't have any real world experience at that distance and spanning several races.
Thinking I would probably run S&S and Q&D type sessions 3 days a week, run 3, and 1 day of easy swimming.