I liked to transition from some kind of split, into more of a full body, Bill Star type routine a couple months before competitions.
I would also try to work in more lifts like power cleans, front squats, bent rows, and of course all kinds over overhead work, while switching away from things like bench press, leg presses or chins. The idea was to lift on my feet more, and be "supported" less.
I also like the full body routine because of the increased frequency over a routine like 5/3/1. Workouts kinda feel more like sports training, like I was getting more conditioned and athletic/explosive.
No disrespect to 5/3/1. It's an awesome system, but it feels more "general" to me. Like you'd use 5/3/1 as your base routine most of the time, like the in off-season. Then use a more "specialized" routine to prepare for upcoming competition season. Finally, between competitions you'd be doing mostly abs/lower back and event training.
Like a block-periodization plan.
Start doing tons of weighed ab/oblique/lower back work now. Side-bends, back raises with weight behind your head, decline situps with weight behind your head, leg raises with dumbbells between your feet, etc. You need that strong mid-section to get the power from your legs to your arms. Try to work up to like 3 weighted ab exercises a workout.
Work on your push press and push jerk. Use leg drive to blast stuff overhead and long arms won't matter.
Just in general, get accustomed to moving around, standing on your feet, and using your body in one piece.
What kind of shape are you in now? Will you be better off bulking up to 260? Or dropping down to 231 and going lightweight?