I am about to transfer to a unit that requires a PFT which includes a 1.5 mile run in 14:33. So I need to be training for that, while simultaneously focusing on Zone 2 LISS cardio
I'd start here: Method - Dr. Phil Maffetone
Problem is, according to the results, my Zone 2 HR is something like 95-120 bpm. If I even try to run, my HR is spiking to 130-150.
I’m talking months, (into years) and the sessions need to get to be relatively long as well. Start out slow, take your time.
This.
You'll need to alternate running and walking to keep your HR low enough. Your goal pace is around 9:40 per mile. I'd start by doing the test and seeing where you're at.
Also you don't mention your body composition, but dropping weight is something to consider.
As to keeping your kettlebell training, if you've got a short-term goal, I'd focus on achieving it, putting strength training on the back burner. A reasonable routine would be that you'd have a run/walk day followed by a kettlebell day and then a day off/easy that might include walking. You want to be rested for what's the focus of your training.
-S-