I'd cut it down to 2-3 days a week, wholebody, with a lower body emphasis. Most people would say that you don't need to do lower body in the gym if you do running, but I'd contend on the contrary, that if you need your legs, then it only makes sense to focus on trainng them. Admittedly, you've cut it a bit short to start asking for strength and conditioning advice (which is really what you need in this instance), so at this point, you won't get as much out of what I could tell you if the run was, say, 6 months ahead. But don't let that be discouraging.
It sounds like you're doing a bodybuilding program. I'd recommend that for now you abstain from bodybuilding and move into sports-specific training to aid in your run. You shouldn't lose muscle from training this way, but you may not gain any, either.
If you've been doing resistance training for more than a year, I'd suggest getting into max strength training for the next month, and then in the following month, merge across to muscle endurance.
If you haven't been doing resistance training for that long, just move across to muscle endurance.
For a max strength program, I suggest something to the effect of:
- Day 1: Squats, Deadlifts, Bench Press
- Day 2: Squats, Deadlifts, Bench Pull
- Sets: 3 x warm up, 3 x work at 80-100% 1RM
- Reps: 1-8
- Rest: 3 min
- Tempo: 2:0:1 (lower the weight as quickly as possible without sacrificing control - don't drop the weight. lift the weight as fast as possible. it may take several seconds, but aim for only 1)
For an endurance program, suggest something to the effect of:
- Squats, Traveling Lunges*, Deadlift, superset bench press with bent over row**.
- Sets: lower body start at 5 and work down to 1, upper body 3
- Reps: lower body start at 2 min and work up to 10 min, upper body 15
- Rest: lower body 30 sec, upper body N/A
- Tempo: 2:0:2
* Perform with cyclic gait, thrusting knee up to be parallel to hip while simultaneously thrusting foot up to your backside. This is a much better movement for a runner, and does a better job at involving the hamstrings.
** Upper body resistance training is more to serve the purpose of maintaining upper body muscle and strength. Supersets will work cardiovascular endurance, but not muscle endurance.
