Ellis

if you go ahead with a strongman/powerlifting routine you will more than likely find you will have to cut your training down.

first of the cardio doesn't have to be to the degree that you are doing at the moment and you'll prob want to cut your weight training sessions down to 3 sessions a week focusing just on the big exercises, personally if i were you going from BB into a powerlifting routine i would advise you to go with either:

3 days a week: ie mon, wed, fri split

day 1: squat and some assistance
day 2 bench and assistance exercises for shoulders and tricps
day 3: deadlift and assistance work for hams and abs

or:

day 1: squat and deadlift
day 2: bench and assistance for shouders and triceps
day 3: upper back assistance exercises and abs etc

these routines trained hard and heavy will be enough to knacker you out good and proper and you'll want and need lots of rest.

If you go with strongman trainnig aswell i would go with:

day 1: squats and deadlift
day 2: bench overhead press and upper body assistance work
day 3: event training